Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 763 · 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. 1.320 increased by 30% =
2. 2.676 decreased by 25% =
3. 3.260 increased by 40% =
4. 4.105 decreased by 20% =
5. 5.740 increased by 15% =
6. 6.380 increased by 15% =
7. 7.540 increased by 35% =
8. 8.520 decreased by 15% =
9. 9.402 decreased by 50% =
10. 10.644 decreased by 50% =
11. 11.270 decreased by 50% =
12. 12.425 increased by 60% =
13. 13.476 increased by 75% =
14. 14.140 decreased by 5% =
15. 15.532 increased by 75% =
16. 16.452 decreased by 25% =
17. 17.220 increased by 10% =
18. 18.300 increased by 10% =
19. 19.140 decreased by 5% =
20. 20.75 increased by 12% =
21. 21.656 increased by 75% =
22. 22.732 decreased by 75% =
23. 23.750 increased by 12% =
24. 24.400 increased by 8% =
25. 25.240 increased by 10% =
26. 26.460 decreased by 5% =
27. 27.510 increased by 30% =
28. 28.425 decreased by 8% =
29. 29.720 increased by 75% =
30. 30.380 increased by 10% =
31. 31.260 decreased by 15% =
32. 32.700 increased by 15% =
33. 33.560 increased by 30% =
34. 34.92 increased by 75% =
35. 35.360 increased by 35% =
36. 36.290 increased by 50% =
37. 37.738 decreased by 50% =
38. 38.665 increased by 40% =
39. 39.580 decreased by 10% =
40. 40.212 increased by 75% =

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