Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 741 · 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. 1.100 increased by 20% =
2. 2.60 increased by 60% =
3. 3.620 increased by 15% =
4. 4.680 decreased by 35% =
5. 5.682 increased by 50% =
6. 6.800 increased by 15% =
7. 7.70 increased by 60% =
8. 8.95 increased by 60% =
9. 9.555 decreased by 60% =
10. 10.500 increased by 5% =
11. 11.70 increased by 10% =
12. 12.80 increased by 5% =
13. 13.285 decreased by 40% =
14. 14.90 decreased by 30% =
15. 15.570 decreased by 10% =
16. 16.765 increased by 20% =
17. 17.160 decreased by 35% =
18. 18.725 decreased by 60% =
19. 19.555 decreased by 20% =
20. 20.384 increased by 75% =
21. 21.96 increased by 75% =
22. 22.150 increased by 8% =
23. 23.136 decreased by 75% =
24. 24.452 decreased by 25% =
25. 25.320 increased by 5% =
26. 26.408 increased by 25% =
27. 27.305 decreased by 20% =
28. 28.290 increased by 30% =
29. 29.460 decreased by 10% =
30. 30.552 increased by 25% =
31. 31.660 increased by 35% =
32. 32.80 decreased by 5% =
33. 33.404 decreased by 75% =
34. 34.776 increased by 25% =
35. 35.800 decreased by 8% =
36. 36.240 decreased by 15% =
37. 37.480 decreased by 5% =
38. 38.780 increased by 30% =
39. 39.596 increased by 25% =
40. 40.570 decreased by 40% =

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