Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 657 · 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. 1.800 increased by 8% =
2. 2.436 decreased by 75% =
3. 3.760 increased by 35% =
4. 4.485 decreased by 20% =
5. 5.196 increased by 25% =
6. 6.580 decreased by 5% =
7. 7.375 decreased by 60% =
8. 8.360 decreased by 10% =
9. 9.280 increased by 15% =
10. 10.540 increased by 10% =
11. 11.50 increased by 12% =
12. 12.150 increased by 50% =
13. 13.275 decreased by 8% =
14. 14.365 increased by 40% =
15. 15.796 decreased by 50% =
16. 16.512 decreased by 25% =
17. 17.740 decreased by 35% =
18. 18.50 decreased by 40% =
19. 19.125 increased by 8% =
20. 20.90 decreased by 10% =
21. 21.530 decreased by 10% =
22. 22.50 decreased by 30% =
23. 23.660 increased by 35% =
24. 24.444 increased by 50% =
25. 25.685 increased by 60% =
26. 26.800 increased by 30% =
27. 27.500 increased by 35% =
28. 28.700 decreased by 10% =
29. 29.430 decreased by 20% =
30. 30.540 increased by 15% =
31. 31.220 increased by 5% =
32. 32.465 decreased by 60% =
33. 33.720 increased by 30% =
34. 34.600 increased by 35% =
35. 35.160 increased by 40% =
36. 36.575 increased by 40% =
37. 37.656 decreased by 25% =
38. 38.740 increased by 35% =
39. 39.75 increased by 12% =
40. 40.530 decreased by 10% =

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