Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 717 · 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. 1.180 increased by 35% =
2. 2.540 increased by 10% =
3. 3.720 increased by 30% =
4. 4.180 decreased by 35% =
5. 5.140 increased by 15% =
6. 6.700 increased by 12% =
7. 7.760 increased by 10% =
8. 8.280 decreased by 40% =
9. 9.235 increased by 20% =
10. 10.552 increased by 75% =
11. 11.365 increased by 60% =
12. 12.320 increased by 60% =
13. 13.680 increased by 35% =
14. 14.560 decreased by 75% =
15. 15.322 decreased by 50% =
16. 16.475 decreased by 8% =
17. 17.120 decreased by 15% =
18. 18.125 increased by 8% =
19. 19.320 decreased by 15% =
20. 20.415 decreased by 60% =
21. 21.292 increased by 25% =
22. 22.402 increased by 50% =
23. 23.700 decreased by 35% =
24. 24.312 increased by 50% =
25. 25.540 decreased by 5% =
26. 26.560 decreased by 35% =
27. 27.228 decreased by 50% =
28. 28.170 decreased by 40% =
29. 29.468 increased by 75% =
30. 30.390 increased by 10% =
31. 31.352 decreased by 75% =
32. 32.392 decreased by 25% =
33. 33.320 decreased by 15% =
34. 34.400 decreased by 35% =
35. 35.560 increased by 15% =
36. 36.456 increased by 75% =
37. 37.220 increased by 30% =
38. 38.190 increased by 40% =
39. 39.340 decreased by 35% =
40. 40.380 decreased by 20% =

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