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A repair bill in Nashik shows a service charge of ₹2400 with GST of ₹432 added on top. What GST rate was applied?

Class 8Comparing QuantitiesComparing Quantities
  • A18%
  • B15.3%
  • C5.6%
  • D4.32%

Step-by-Step Solution

GST is a percent of the pre-tax charge: %. Trap: dividing by the ₹2832 total instead of the ₹2400 charge gives 15.3% — tax is never a percentage of the tax-inclusive figure. Flipping the fraction gives 5.6%.
Answer: A) 18%

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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