Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 335 · 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. 1.108 increased by 75% =
2. 2.200 decreased by 12% =
3. 3.160 decreased by 35% =
4. 4.192 decreased by 75% =
5. 5.608 increased by 25% =
6. 6.524 increased by 25% =
7. 7.800 increased by 60% =
8. 8.330 decreased by 20% =
9. 9.320 increased by 30% =
10. 10.260 increased by 30% =
11. 11.40 decreased by 5% =
12. 12.364 increased by 75% =
13. 13.250 decreased by 10% =
14. 14.290 decreased by 10% =
15. 15.208 increased by 25% =
16. 16.98 increased by 50% =
17. 17.140 decreased by 30% =
18. 18.120 increased by 30% =
19. 19.72 decreased by 75% =
20. 20.415 decreased by 40% =
21. 21.625 increased by 12% =
22. 22.530 increased by 10% =
23. 23.144 increased by 75% =
24. 24.615 increased by 40% =
25. 25.492 increased by 75% =
26. 26.460 increased by 25% =
27. 27.200 decreased by 12% =
28. 28.325 increased by 12% =
29. 29.272 decreased by 50% =
30. 30.138 decreased by 50% =
31. 31.64 increased by 50% =
32. 32.130 decreased by 30% =
33. 33.75 increased by 12% =
34. 34.315 decreased by 20% =
35. 35.255 increased by 20% =
36. 36.720 decreased by 35% =
37. 37.100 decreased by 75% =
38. 38.700 decreased by 60% =
39. 39.325 decreased by 40% =
40. 40.220 increased by 15% =

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