Lesson eLearning

In the year 1921, the number of volunteers in the Non‑Cooperation Movement increased from 1.2 million in 1920 to 2.0 million. What is the percentage increase in volunteers from 1920 to 1921?

medium 2 marks Class 8 · History · The Making of the National Movement
Answer
66.7%

The correct answer is 66.7% — Multiply by 100 to get 66.67%. Rounded to one decimal place: 66.7%.

Step-by-step solution

  1. Use the formula for percentage increase: ((new‑old)/old)×100.
  2. Substitute old = 1.2 million and new = 2.0 million.
  3. Calculate the numerator: 2.0 – 1.2 = 0.8 million.
  4. Divide 0.8 by 1.2 to obtain 0.6667.
  5. Multiply by 100 to get 66.67%. Rounded to one decimal place: 66.7%.
Common mistake: Forgetting to divide by the original value

Concept tested: Calculating percentage change in volunteer numbers

Published · How this solution was prepared and checked

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