Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 759 · 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. 1.275 increased by 8% =
2. 2.710 increased by 30% =
3. 3.130 decreased by 30% =
4. 4.76 increased by 50% =
5. 5.545 decreased by 60% =
6. 6.590 increased by 30% =
7. 7.40 increased by 15% =
8. 8.175 decreased by 12% =
9. 9.395 decreased by 40% =
10. 10.150 decreased by 10% =
11. 11.120 increased by 25% =
12. 12.150 increased by 30% =
13. 13.112 increased by 50% =
14. 14.290 decreased by 30% =
15. 15.580 increased by 15% =
16. 16.610 decreased by 40% =
17. 17.94 decreased by 50% =
18. 18.50 increased by 60% =
19. 19.125 decreased by 8% =
20. 20.610 decreased by 60% =
21. 21.335 decreased by 20% =
22. 22.255 decreased by 20% =
23. 23.440 increased by 40% =
24. 24.130 increased by 20% =
25. 25.602 decreased by 50% =
26. 26.800 increased by 12% =
27. 27.50 decreased by 60% =
28. 28.472 increased by 75% =
29. 29.340 decreased by 35% =
30. 30.440 decreased by 35% =
31. 31.232 decreased by 75% =
32. 32.125 increased by 8% =
33. 33.615 increased by 40% =
34. 34.736 decreased by 25% =
35. 35.636 decreased by 50% =
36. 36.40 increased by 5% =
37. 37.690 increased by 30% =
38. 38.780 decreased by 35% =
39. 39.170 decreased by 60% =
40. 40.700 decreased by 35% =

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