Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 814 · 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. 1.90 decreased by 60% =
2. 2.544 increased by 75% =
3. 3.410 decreased by 10% =
4. 4.250 increased by 30% =
5. 5.580 decreased by 15% =
6. 6.465 decreased by 40% =
7. 7.275 increased by 60% =
8. 8.760 decreased by 15% =
9. 9.240 increased by 5% =
10. 10.250 decreased by 8% =
11. 11.230 increased by 50% =
12. 12.720 decreased by 35% =
13. 13.292 decreased by 75% =
14. 14.100 decreased by 35% =
15. 15.125 increased by 8% =
16. 16.725 increased by 8% =
17. 17.270 increased by 10% =
18. 18.104 decreased by 75% =
19. 19.290 decreased by 20% =
20. 20.290 decreased by 10% =
21. 21.364 increased by 25% =
22. 22.800 increased by 12% =
23. 23.560 decreased by 60% =
24. 24.655 decreased by 60% =
25. 25.140 decreased by 20% =
26. 26.760 increased by 5% =
27. 27.160 decreased by 10% =
28. 28.450 decreased by 40% =
29. 29.360 increased by 35% =
30. 30.195 increased by 20% =
31. 31.280 decreased by 15% =
32. 32.550 decreased by 8% =
33. 33.450 increased by 50% =
34. 34.225 increased by 8% =
35. 35.110 increased by 30% =
36. 36.390 decreased by 60% =
37. 37.720 increased by 30% =
38. 38.525 increased by 60% =
39. 39.296 decreased by 50% =
40. 40.130 decreased by 30% =

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