Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 161 · 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. 1.40 decreased by 35% =
2. 2.575 decreased by 40% =
3. 3.520 increased by 5% =
4. 4.80 increased by 5% =
5. 5.390 decreased by 10% =
6. 6.440 increased by 5% =
7. 7.250 increased by 8% =
8. 8.672 increased by 75% =
9. 9.196 decreased by 25% =
10. 10.530 decreased by 10% =
11. 11.395 increased by 60% =
12. 12.180 decreased by 5% =
13. 13.760 decreased by 5% =
14. 14.580 decreased by 5% =
15. 15.365 increased by 60% =
16. 16.488 decreased by 25% =
17. 17.75 decreased by 12% =
18. 18.796 increased by 50% =
19. 19.450 decreased by 8% =
20. 20.84 decreased by 25% =
21. 21.525 increased by 8% =
22. 22.552 decreased by 25% =
23. 23.264 increased by 75% =
24. 24.250 decreased by 12% =
25. 25.500 increased by 30% =
26. 26.100 decreased by 35% =
27. 27.730 decreased by 40% =
28. 28.780 decreased by 15% =
29. 29.270 increased by 20% =
30. 30.720 increased by 15% =
31. 31.374 increased by 50% =
32. 32.396 increased by 25% =
33. 33.700 increased by 5% =
34. 34.400 decreased by 75% =
35. 35.420 increased by 30% =
36. 36.240 decreased by 20% =
37. 37.120 increased by 15% =
38. 38.360 decreased by 40% =
39. 39.220 increased by 35% =
40. 40.750 increased by 40% =

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