Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 951 · 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. 1.336 increased by 50% =
2. 2.550 increased by 40% =
3. 3.488 decreased by 75% =
4. 4.80 decreased by 30% =
5. 5.125 decreased by 20% =
6. 6.300 decreased by 12% =
7. 7.175 decreased by 20% =
8. 8.730 decreased by 40% =
9. 9.750 decreased by 60% =
10. 10.600 increased by 15% =
11. 11.264 decreased by 75% =
12. 12.110 decreased by 40% =
13. 13.400 increased by 40% =
14. 14.600 decreased by 5% =
15. 15.615 decreased by 60% =
16. 16.128 decreased by 25% =
17. 17.575 decreased by 12% =
18. 18.110 decreased by 10% =
19. 19.250 increased by 40% =
20. 20.625 increased by 60% =
21. 21.120 increased by 35% =
22. 22.800 increased by 60% =
23. 23.535 increased by 20% =
24. 24.355 increased by 20% =
25. 25.300 increased by 15% =
26. 26.170 increased by 40% =
27. 27.300 decreased by 5% =
28. 28.725 decreased by 8% =
29. 29.740 increased by 20% =
30. 30.260 decreased by 40% =
31. 31.245 decreased by 20% =
32. 32.160 decreased by 15% =
33. 33.472 decreased by 75% =
34. 34.780 increased by 15% =
35. 35.148 decreased by 75% =
36. 36.240 increased by 35% =
37. 37.560 decreased by 5% =
38. 38.800 increased by 15% =
39. 39.268 decreased by 50% =
40. 40.425 increased by 8% =

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