Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 487 · 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. 1.460 decreased by 15% =
2. 2.420 increased by 15% =
3. 3.560 increased by 5% =
4. 4.576 decreased by 75% =
5. 5.660 increased by 5% =
6. 6.560 decreased by 5% =
7. 7.400 increased by 35% =
8. 8.385 decreased by 60% =
9. 9.360 increased by 5% =
10. 10.486 decreased by 50% =
11. 11.145 decreased by 20% =
12. 12.710 increased by 40% =
13. 13.405 increased by 60% =
14. 14.700 decreased by 10% =
15. 15.160 decreased by 25% =
16. 16.510 increased by 60% =
17. 17.730 increased by 20% =
18. 18.515 increased by 60% =
19. 19.640 decreased by 35% =
20. 20.306 decreased by 50% =
21. 21.45 increased by 20% =
22. 22.272 decreased by 25% =
23. 23.800 decreased by 15% =
24. 24.50 increased by 8% =
25. 25.592 increased by 25% =
26. 26.280 decreased by 75% =
27. 27.740 increased by 30% =
28. 28.396 increased by 75% =
29. 29.558 decreased by 50% =
30. 30.500 decreased by 5% =
31. 31.340 increased by 10% =
32. 32.675 decreased by 8% =
33. 33.100 increased by 25% =
34. 34.700 decreased by 30% =
35. 35.270 increased by 50% =
36. 36.705 decreased by 60% =
37. 37.650 decreased by 8% =
38. 38.712 decreased by 25% =
39. 39.220 increased by 10% =
40. 40.300 decreased by 15% =

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