Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 214 · 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. 1.270 decreased by 60% =
2. 2.500 decreased by 5% =
3. 3.525 decreased by 8% =
4. 4.692 increased by 75% =
5. 5.535 increased by 40% =
6. 6.50 increased by 8% =
7. 7.750 increased by 12% =
8. 8.800 increased by 5% =
9. 9.50 decreased by 8% =
10. 10.325 decreased by 12% =
11. 11.600 increased by 75% =
12. 12.528 increased by 50% =
13. 13.390 decreased by 10% =
14. 14.640 decreased by 5% =
15. 15.640 decreased by 35% =
16. 16.540 increased by 5% =
17. 17.435 decreased by 20% =
18. 18.220 decreased by 60% =
19. 19.700 increased by 12% =
20. 20.120 decreased by 50% =
21. 21.336 increased by 50% =
22. 22.614 increased by 50% =
23. 23.775 decreased by 12% =
24. 24.624 decreased by 75% =
25. 25.80 decreased by 5% =
26. 26.300 decreased by 8% =
27. 27.150 increased by 30% =
28. 28.435 increased by 40% =
29. 29.325 decreased by 8% =
30. 30.650 increased by 50% =
31. 31.380 decreased by 5% =
32. 32.520 increased by 30% =
33. 33.225 increased by 8% =
34. 34.245 decreased by 60% =
35. 35.520 decreased by 10% =
36. 36.540 decreased by 30% =
37. 37.240 increased by 35% =
38. 38.465 decreased by 40% =
39. 39.320 increased by 5% =
40. 40.640 increased by 40% =

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