Question

The number of illiterate persons in a country decreased from $150$ lakhs to $100$ lakhs in $10$ years. What is the percentage of decrease?

• A. $35\frac{1}{3}\%$
• B. $37\frac{1}{3}\%$
• C. $33\frac{1}{3}\%$
• D. $34\frac{1}{3}\%$

Answer 1

The correct option is C $33\frac{1}{3}\%$

Original amount $=150$ lakhs
Amount of change $=150-100=50$ lakhs
Therefore, the percentage of decrease
$=\frac{\text{Amount of change}}{\text{Original amount}}\times 100=\frac{50}{150}\times 100=33\frac{1}{3}\%$