Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 553 · 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. 1.280 increased by 5% =
2. 2.540 decreased by 30% =
3. 3.750 decreased by 30% =
4. 4.650 increased by 60% =
5. 5.390 increased by 10% =
6. 6.580 decreased by 35% =
7. 7.186 decreased by 50% =
8. 8.80 decreased by 30% =
9. 9.175 decreased by 60% =
10. 10.688 increased by 25% =
11. 11.575 decreased by 8% =
12. 12.64 decreased by 75% =
13. 13.615 increased by 20% =
14. 14.496 decreased by 75% =
15. 15.570 increased by 30% =
16. 16.140 decreased by 20% =
17. 17.225 increased by 8% =
18. 18.120 decreased by 15% =
19. 19.780 increased by 5% =
20. 20.130 decreased by 60% =
21. 21.700 increased by 8% =
22. 22.380 increased by 5% =
23. 23.700 decreased by 10% =
24. 24.120 increased by 10% =
25. 25.700 decreased by 10% =
26. 26.740 increased by 35% =
27. 27.700 increased by 35% =
28. 28.752 decreased by 50% =
29. 29.400 increased by 5% =
30. 30.200 increased by 15% =
31. 31.320 decreased by 5% =
32. 32.200 increased by 8% =
33. 33.400 decreased by 12% =
34. 34.175 decreased by 8% =
35. 35.110 decreased by 30% =
36. 36.685 increased by 20% =
37. 37.192 increased by 25% =
38. 38.76 decreased by 25% =
39. 39.436 decreased by 25% =
40. 40.175 decreased by 12% =

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