Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 236 · 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. 1.280 increased by 5% =
2. 2.540 increased by 10% =
3. 3.164 increased by 75% =
4. 4.380 decreased by 35% =
5. 5.740 increased by 15% =
6. 6.290 increased by 60% =
7. 7.300 decreased by 35% =
8. 8.716 increased by 25% =
9. 9.200 decreased by 8% =
10. 10.320 decreased by 10% =
11. 11.260 decreased by 10% =
12. 12.720 decreased by 10% =
13. 13.300 increased by 5% =
14. 14.60 increased by 10% =
15. 15.124 increased by 75% =
16. 16.180 decreased by 5% =
17. 17.575 decreased by 8% =
18. 18.600 increased by 40% =
19. 19.560 decreased by 15% =
20. 20.180 decreased by 30% =
21. 21.640 decreased by 30% =
22. 22.675 increased by 8% =
23. 23.450 decreased by 60% =
24. 24.360 increased by 15% =
25. 25.500 increased by 8% =
26. 26.220 increased by 40% =
27. 27.80 increased by 35% =
28. 28.380 increased by 10% =
29. 29.120 increased by 20% =
30. 30.465 decreased by 40% =
31. 31.506 increased by 50% =
32. 32.70 decreased by 60% =
33. 33.360 increased by 10% =
34. 34.550 increased by 8% =
35. 35.75 decreased by 40% =
36. 36.680 increased by 35% =
37. 37.408 increased by 75% =
38. 38.335 increased by 60% =
39. 39.620 decreased by 5% =
40. 40.332 increased by 50% =

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