Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 503 · 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. 1.750 increased by 10% =
2. 2.360 increased by 20% =
3. 3.720 decreased by 15% =
4. 4.136 increased by 75% =
5. 5.540 decreased by 5% =
6. 6.795 increased by 60% =
7. 7.780 decreased by 75% =
8. 8.436 increased by 50% =
9. 9.56 increased by 75% =
10. 10.80 decreased by 10% =
11. 11.700 decreased by 8% =
12. 12.472 increased by 50% =
13. 13.280 increased by 5% =
14. 14.580 increased by 15% =
15. 15.440 decreased by 10% =
16. 16.660 decreased by 5% =
17. 17.210 decreased by 60% =
18. 18.250 decreased by 12% =
19. 19.136 increased by 25% =
20. 20.250 decreased by 20% =
21. 21.565 decreased by 20% =
22. 22.400 increased by 12% =
23. 23.100 increased by 25% =
24. 24.660 increased by 20% =
25. 25.100 decreased by 30% =
26. 26.170 decreased by 10% =
27. 27.220 increased by 30% =
28. 28.40 increased by 20% =
29. 29.440 increased by 15% =
30. 30.175 increased by 12% =
31. 31.350 decreased by 30% =
32. 32.250 increased by 30% =
33. 33.140 decreased by 60% =
34. 34.400 decreased by 30% =
35. 35.780 decreased by 30% =
36. 36.160 increased by 40% =
37. 37.720 increased by 20% =
38. 38.240 increased by 30% =
39. 39.692 increased by 25% =
40. 40.495 decreased by 60% =

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