Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 12 · 40 questions

The fast method (One-step multiplier): Increase by p%: multiply by (100 + p)% — up 20% is × 1.2. Decrease by p%: multiply by (100 − p)% — down 25% is × 0.75. Easy way to multiply: × the whole number (115 or 75), then ÷ 100.

1. 1.52 increased by 50% =
2. 2.424 decreased by 25% =
3. 3.476 increased by 25% =
4. 4.760 decreased by 35% =
5. 5.500 decreased by 50% =
6. 6.160 decreased by 20% =
7. 7.290 increased by 60% =
8. 8.530 decreased by 40% =
9. 9.460 decreased by 25% =
10. 10.420 increased by 35% =
11. 11.40 increased by 35% =
12. 12.700 increased by 35% =
13. 13.230 increased by 30% =
14. 14.184 increased by 75% =
15. 15.390 increased by 60% =
16. 16.520 increased by 60% =
17. 17.40 increased by 35% =
18. 18.310 decreased by 30% =
19. 19.50 decreased by 8% =
20. 20.140 decreased by 25% =
21. 21.480 increased by 5% =
22. 22.490 increased by 60% =
23. 23.535 decreased by 60% =
24. 24.240 increased by 20% =
25. 25.180 decreased by 30% =
26. 26.60 decreased by 15% =
27. 27.725 increased by 8% =
28. 28.275 increased by 12% =
29. 29.580 increased by 35% =
30. 30.608 decreased by 75% =
31. 31.720 decreased by 35% =
32. 32.170 increased by 20% =
33. 33.676 decreased by 50% =
34. 34.100 decreased by 8% =
35. 35.200 decreased by 15% =
36. 36.385 decreased by 40% =
37. 37.656 increased by 75% =
38. 38.80 decreased by 5% =
39. 39.340 increased by 15% =
40. 40.270 increased by 60% =

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