Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 350 · 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. 1.200 increased by 35% =
2. 2.744 increased by 50% =
3. 3.600 increased by 5% =
4. 4.400 decreased by 10% =
5. 5.440 increased by 35% =
6. 6.80 decreased by 15% =
7. 7.160 increased by 5% =
8. 8.640 increased by 15% =
9. 9.800 increased by 12% =
10. 10.535 increased by 20% =
11. 11.190 decreased by 20% =
12. 12.380 decreased by 10% =
13. 13.730 increased by 30% =
14. 14.300 decreased by 30% =
15. 15.120 decreased by 10% =
16. 16.280 decreased by 40% =
17. 17.300 increased by 5% =
18. 18.110 increased by 60% =
19. 19.270 increased by 30% =
20. 20.160 increased by 5% =
21. 21.425 increased by 12% =
22. 22.68 decreased by 25% =
23. 23.144 increased by 75% =
24. 24.620 decreased by 20% =
25. 25.604 decreased by 75% =
26. 26.320 decreased by 35% =
27. 27.288 increased by 75% =
28. 28.600 increased by 5% =
29. 29.140 increased by 20% =
30. 30.736 decreased by 75% =
31. 31.720 increased by 35% =
32. 32.720 increased by 10% =
33. 33.560 increased by 10% =
34. 34.505 increased by 60% =
35. 35.416 decreased by 75% =
36. 36.160 increased by 35% =
37. 37.675 increased by 12% =
38. 38.130 increased by 30% =
39. 39.600 decreased by 5% =
40. 40.560 decreased by 25% =

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