Accounting Ratios Exam Strategy: Complete Formula Sheet, Mistakes & Practice Plan — Class 12

Ratio analysis questions in CBSE Class 12 are worth 10–12 marks — and they are among the most predictable questions in the paper. The formulas don't change. The format doesn't change. What separates full-mark answers from partial-mark answers is accuracy, presentation, and avoiding a handful of entirely avoidable errors.

This post gives you everything you need to make ratio questions a guaranteed scoring zone.

The 5-Step Method for Every Ratio Question

Follow this sequence for each ratio you calculate — in order:

Step 1 — Write the formula
State the formula before doing any arithmetic. This earns method marks even if your calculation has an error.

Step 2 — Identify the components
Extract the relevant figures from the financial statement. If averages are needed, calculate them as a working note.

Step 3 — Calculate systematically
Show the substituted figures clearly: numerator ÷ denominator. Don't compress steps.

Step 4 — Express in the correct form

• Liquidity and Solvency ratios → expressed as X:1
• Activity ratios → expressed as X times
• Profitability ratios → expressed as X% (multiply by 100)

Step 5 — Interpret if the question asks
One or two sentences. State what the ratio value means in the context of the ideal value and what it implies about the company's position.

Time allocation: 15–18 minutes for a full 12-mark ratio question. That is approximately 2.5–3 minutes per ratio.

Complete Formula Reference Card

Liquidity Ratios

Quick Assets = Current Assets − Stock − Prepaid Expenses

Solvency Ratios

Shareholders' Funds = Equity Capital + Preference Capital + Reserves − Accumulated Losses

Activity (Turnover) Ratios

Average = (Opening Balance + Closing Balance) ÷ 2

Profitability Ratios

Capital Employed = Shareholders' Funds + Long-term Debts

The 5 Most Common Mistakes — and the Fix for Each

Mistake 1: Using Sales Instead of COGS for Inventory Turnover

Wrong: Inventory Turnover = Sales ÷ Average Inventory
Right: Inventory Turnover = Cost of Goods Sold ÷ Average Inventory

Inventory is valued at cost — the numerator must be on the same basis.

Mistake 2: Using Closing Balance Instead of Average for Turnover Ratios

Wrong: Receivables Turnover = Net Credit Sales ÷ Closing Debtors
Right: Receivables Turnover = Net Credit Sales ÷ Average Debtors

If the question provides both opening and closing figures, average them. Always.

Mistake 3: Including Bank Overdraft in Long-term Debts

Wrong: Long-term Debts include bank overdraft
Right: Bank overdraft is a current liability — it belongs in Current Liabilities, not in the Debt-Equity numerator

Mistake 4: Forgetting to Multiply Profitability Ratios by 100

Wrong: GP Ratio = 3,00,000 ÷ 10,00,000 = 0.3
Right: GP Ratio = (3,00,000 ÷ 10,00,000) × 100 = 30%

All three profitability ratios are expressed as percentages.

Mistake 5: Not Subtracting Accumulated Losses from Shareholders' Funds

Wrong: Shareholders' Funds = Share Capital + Reserves
Right: Shareholders' Funds = Share Capital + Reserves − Accumulated Losses (debit balance in P&L A/c)

A debit balance in the P&L Account is a loss, not a reserve. It reduces the net worth.

CASA Quick-Fire Memory Aid

Ideal Ratio Values: Summary

Your Practice Plan

For CBSE Class 12 (10–12 marks target)

• Memorise all 9 formulas with their ideal values — no exceptions
• 10 problems on liquidity ratios — include edge cases (bank overdraft, advance payments)
• 10 problems on solvency ratios — practise identifying Shareholders' Funds correctly
• 10 problems on activity ratios — always compute averages; practice converting to days
• 10 problems on profitability ratios — practise identifying GP, NP, and Capital Employed from statements
• 10 mixed problems — extract and calculate 4–6 ratios from a single set of financial statements
• Previous 3 years' board papers — timed, under exam conditions

For CA Foundation

• MCQ drill on ideal values — these appear directly as options
• Component identification practice — which items belong in Shareholders' Funds? Long-term Debts? Current Assets?
• Formula variation MCQs — some questions rearrange formulas to find a missing component
• Target: any single ratio calculation in under 90 seconds

Full Series Recap

Work through the series in order, practise component identification before formula substitution, and use this post as your pre-exam audit. Ratio analysis rewards systematic practice — and with the right approach, it becomes one of the most reliable chapters in the entire syllabus.