Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 829 · 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. 1.60 decreased by 35% =
2. 2.220 increased by 15% =
3. 3.745 decreased by 20% =
4. 4.500 decreased by 5% =
5. 5.520 decreased by 30% =
6. 6.140 increased by 35% =
7. 7.656 decreased by 50% =
8. 8.520 increased by 15% =
9. 9.265 decreased by 20% =
10. 10.790 decreased by 10% =
11. 11.380 increased by 20% =
12. 12.284 increased by 50% =
13. 13.56 decreased by 75% =
14. 14.480 decreased by 10% =
15. 15.215 decreased by 20% =
16. 16.700 decreased by 35% =
17. 17.624 decreased by 25% =
18. 18.128 increased by 75% =
19. 19.608 increased by 75% =
20. 20.350 increased by 30% =
21. 21.125 increased by 8% =
22. 22.88 increased by 50% =
23. 23.100 decreased by 15% =
24. 24.680 decreased by 35% =
25. 25.76 decreased by 25% =
26. 26.550 decreased by 8% =
27. 27.628 decreased by 75% =
28. 28.250 decreased by 10% =
29. 29.445 increased by 40% =
30. 30.800 decreased by 60% =
31. 31.516 increased by 75% =
32. 32.360 increased by 5% =
33. 33.480 decreased by 35% =
34. 34.250 decreased by 60% =
35. 35.240 decreased by 5% =
36. 36.800 increased by 30% =
37. 37.100 increased by 15% =
38. 38.338 decreased by 50% =
39. 39.280 decreased by 15% =
40. 40.170 decreased by 60% =

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