Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 698 · 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. 1.560 increased by 10% =
2. 2.560 decreased by 35% =
3. 3.220 decreased by 5% =
4. 4.625 increased by 8% =
5. 5.695 increased by 40% =
6. 6.444 increased by 50% =
7. 7.100 decreased by 8% =
8. 8.720 increased by 10% =
9. 9.110 decreased by 30% =
10. 10.225 increased by 40% =
11. 11.505 increased by 60% =
12. 12.650 increased by 30% =
13. 13.620 decreased by 15% =
14. 14.80 increased by 5% =
15. 15.676 increased by 50% =
16. 16.720 decreased by 5% =
17. 17.700 decreased by 12% =
18. 18.148 decreased by 75% =
19. 19.550 increased by 60% =
20. 20.784 decreased by 25% =
21. 21.280 increased by 30% =
22. 22.290 increased by 30% =
23. 23.800 decreased by 12% =
24. 24.180 decreased by 35% =
25. 25.475 decreased by 20% =
26. 26.180 decreased by 5% =
27. 27.520 decreased by 15% =
28. 28.460 increased by 30% =
29. 29.700 increased by 35% =
30. 30.776 increased by 25% =
31. 31.540 decreased by 40% =
32. 32.512 decreased by 25% =
33. 33.760 decreased by 5% =
34. 34.625 increased by 12% =
35. 35.435 increased by 40% =
36. 36.760 decreased by 35% =
37. 37.190 decreased by 20% =
38. 38.720 decreased by 40% =
39. 39.140 decreased by 10% =
40. 40.800 increased by 40% =

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