Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 525 · 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. 1.740 increased by 5% =
2. 2.85 decreased by 20% =
3. 3.64 increased by 50% =
4. 4.730 decreased by 40% =
5. 5.140 increased by 35% =
6. 6.356 decreased by 50% =
7. 7.336 increased by 25% =
8. 8.552 increased by 75% =
9. 9.380 increased by 35% =
10. 10.100 increased by 5% =
11. 11.125 decreased by 40% =
12. 12.340 decreased by 75% =
13. 13.415 decreased by 20% =
14. 14.575 decreased by 8% =
15. 15.56 increased by 25% =
16. 16.280 increased by 60% =
17. 17.45 increased by 40% =
18. 18.392 decreased by 75% =
19. 19.316 increased by 25% =
20. 20.120 increased by 75% =
21. 21.660 increased by 5% =
22. 22.330 decreased by 40% =
23. 23.255 increased by 60% =
24. 24.180 decreased by 40% =
25. 25.180 decreased by 35% =
26. 26.270 increased by 40% =
27. 27.320 increased by 30% =
28. 28.555 decreased by 60% =
29. 29.100 decreased by 8% =
30. 30.680 decreased by 15% =
31. 31.780 increased by 35% =
32. 32.540 increased by 5% =
33. 33.250 increased by 12% =
34. 34.800 increased by 30% =
35. 35.240 decreased by 5% =
36. 36.740 increased by 5% =
37. 37.424 increased by 50% =
38. 38.158 decreased by 50% =
39. 39.600 increased by 12% =
40. 40.300 decreased by 60% =

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