Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 290 · 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. 1.374 increased by 50% =
2. 2.660 decreased by 35% =
3. 3.450 decreased by 10% =
4. 4.535 decreased by 60% =
5. 5.425 increased by 8% =
6. 6.96 decreased by 25% =
7. 7.54 increased by 50% =
8. 8.170 decreased by 30% =
9. 9.445 increased by 60% =
10. 10.50 decreased by 40% =
11. 11.730 increased by 30% =
12. 12.100 decreased by 8% =
13. 13.465 decreased by 60% =
14. 14.788 increased by 25% =
15. 15.275 increased by 8% =
16. 16.500 increased by 20% =
17. 17.190 decreased by 10% =
18. 18.440 increased by 15% =
19. 19.750 increased by 30% =
20. 20.480 increased by 5% =
21. 21.620 decreased by 20% =
22. 22.765 increased by 60% =
23. 23.45 increased by 40% =
24. 24.286 decreased by 50% =
25. 25.305 increased by 60% =
26. 26.70 decreased by 60% =
27. 27.720 decreased by 75% =
28. 28.215 decreased by 60% =
29. 29.788 decreased by 75% =
30. 30.380 increased by 5% =
31. 31.500 increased by 30% =
32. 32.420 decreased by 5% =
33. 33.680 increased by 20% =
34. 34.740 decreased by 20% =
35. 35.40 increased by 30% =
36. 36.236 increased by 50% =
37. 37.566 decreased by 50% =
38. 38.245 increased by 60% =
39. 39.400 decreased by 10% =
40. 40.520 decreased by 5% =

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