If population increases by 20% in one year and 25% in next, total increase is ____. A. 45% B. 50% C. 55% D. 60% Explanation: 1.2 × 1.25 = 1.5 → 50%.
If a number increases by 100% and then decreases by 50%, net change is ____. A. No change B. 50% increase C. 50% decrease D. 25% increase Explanation: 2 × 0.5 = 1 → no change.
If a number decreases by 25% and then increases by 20%, what is the result? A. No change B. 5% decrease C. 10% decrease D. 5% increase Explanation: 0.75 × 1.2 = 0.9 → 10% decrease.
If price increases by 50% and consumption decreases by 20%, what is the change in expenditure? A. 20% increase B. 25% increase C. No change D. 10% decrease Explanation: 1.5 × 0.8 = 1.2 → 20% increase.
If income increases by 50% and expenditure increases by 40%, what happens to savings? A. Increase B. Decrease C. No change D. Cannot determine Explanation: Income rises faster, increasing savings.
If price decreases by 25% and consumption increases by 20%, expenditure is ____. A. Same B. Increased C. Decreased D. Doubled Explanation: 0.75 × 1.2 = 0.9 → 10% decrease.
A number is increased by 40% and then decreased by 20%. Net increase is ____. A. 10% B. 12% C. 15% D. 20% Explanation: 1.4 × 0.8 = 1.12 → 12%.
If cost increases by 25% and consumption decreases by 20%, expenditure is ____. A. Same B. Increased C. Decreased D. Doubled Explanation: 1.25 × 0.8 = 1.
A population decreases by 10% and then increases by 10%. Net effect is ____. A. No change B. 1% increase C. 1% decrease D. 2% decrease Explanation: Net effect = −1%.
If the population increases by 10% annually, what is the increase in 2 years? A. 20% B. 21% C. 22% D. 19% Explanation: 1.1² = 1.21 → 21%.