Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 507 · 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. 1.80 increased by 35% =
2. 2.90 increased by 30% =
3. 3.750 increased by 10% =
4. 4.620 decreased by 25% =
5. 5.275 decreased by 8% =
6. 6.695 increased by 60% =
7. 7.616 increased by 75% =
8. 8.570 increased by 10% =
9. 9.140 increased by 15% =
10. 10.155 decreased by 60% =
11. 11.590 increased by 30% =
12. 12.80 increased by 35% =
13. 13.100 increased by 8% =
14. 14.270 increased by 50% =
15. 15.540 decreased by 60% =
16. 16.246 decreased by 50% =
17. 17.40 increased by 30% =
18. 18.312 decreased by 25% =
19. 19.200 increased by 8% =
20. 20.140 decreased by 5% =
21. 21.400 increased by 12% =
22. 22.150 decreased by 30% =
23. 23.720 decreased by 60% =
24. 24.130 decreased by 60% =
25. 25.188 decreased by 75% =
26. 26.700 increased by 15% =
27. 27.720 increased by 60% =
28. 28.775 increased by 20% =
29. 29.650 increased by 12% =
30. 30.60 increased by 30% =
31. 31.105 increased by 60% =
32. 32.780 decreased by 75% =
33. 33.490 increased by 30% =
34. 34.360 increased by 25% =
35. 35.520 increased by 60% =
36. 36.185 increased by 20% =
37. 37.760 decreased by 30% =
38. 38.40 decreased by 5% =
39. 39.175 decreased by 12% =
40. 40.450 decreased by 10% =

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