Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 876 · 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. 1.148 increased by 75% =
2. 2.70 increased by 10% =
3. 3.320 decreased by 5% =
4. 4.230 increased by 30% =
5. 5.655 decreased by 40% =
6. 6.260 decreased by 35% =
7. 7.90 increased by 10% =
8. 8.785 decreased by 40% =
9. 9.170 decreased by 10% =
10. 10.500 increased by 12% =
11. 11.425 increased by 12% =
12. 12.752 decreased by 75% =
13. 13.390 decreased by 30% =
14. 14.300 decreased by 60% =
15. 15.230 decreased by 60% =
16. 16.175 increased by 8% =
17. 17.720 decreased by 35% =
18. 18.400 decreased by 35% =
19. 19.70 increased by 10% =
20. 20.424 increased by 50% =
21. 21.260 increased by 15% =
22. 22.140 increased by 20% =
23. 23.192 increased by 25% =
24. 24.668 decreased by 25% =
25. 25.725 decreased by 12% =
26. 26.525 decreased by 8% =
27. 27.190 increased by 60% =
28. 28.700 increased by 12% =
29. 29.172 increased by 25% =
30. 30.800 increased by 15% =
31. 31.530 decreased by 30% =
32. 32.760 increased by 35% =
33. 33.112 decreased by 25% =
34. 34.660 decreased by 35% =
35. 35.205 decreased by 40% =
36. 36.40 decreased by 10% =
37. 37.480 decreased by 75% =
38. 38.525 increased by 20% =
39. 39.620 increased by 15% =
40. 40.220 decreased by 5% =

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