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A Lucknow restaurant bill lists ₹900 of food taxed at 5% and ₹400 of packaged drinks taxed at 12%. Find the total tax on the bill.

Class 8Comparing QuantitiesComparing Quantities
  • A₹128
  • B₹110.50
  • C₹221
  • D₹93

Step-by-Step Solution

Tax each part at its own rate: 5% of 900 = 45 and 12% of 400 = 48, so total tax = 45 + 48 = 93. Trap: ₹128 swaps the two rates, ₹110.50 applies the average rate 8.5% to the whole ₹1300, and ₹221 adds the rates to 17% and charges that on everything.
Answer: D) ₹93

Key idea: Sales tax / GST

Tax is added ON TOP of the selling price.

**Final price paid = SP + (SP × rate / 100) = SP × (1 + rate/100).**

Example: SP = ₹600, GST = 12%. Tax = . Final price = 600 + 72 = 672.

If both discount and tax apply, do **discount first** (off MP), then **tax on the discounted SP**.

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