Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 42 · 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. 1.480 increased by 75% =
2. 2.212 increased by 75% =
3. 3.190 decreased by 30% =
4. 4.460 increased by 35% =
5. 5.330 decreased by 10% =
6. 6.625 increased by 12% =
7. 7.500 increased by 8% =
8. 8.220 increased by 15% =
9. 9.142 decreased by 50% =
10. 10.452 increased by 25% =
11. 11.340 decreased by 40% =
12. 12.720 increased by 35% =
13. 13.48 increased by 75% =
14. 14.400 increased by 5% =
15. 15.260 decreased by 25% =
16. 16.124 increased by 50% =
17. 17.675 decreased by 40% =
18. 18.505 increased by 20% =
19. 19.284 increased by 75% =
20. 20.600 increased by 8% =
21. 21.50 decreased by 30% =
22. 22.720 decreased by 5% =
23. 23.220 increased by 15% =
24. 24.270 decreased by 10% =
25. 25.660 increased by 60% =
26. 26.680 decreased by 5% =
27. 27.395 increased by 60% =
28. 28.90 decreased by 10% =
29. 29.470 decreased by 60% =
30. 30.160 increased by 5% =
31. 31.232 decreased by 75% =
32. 32.304 increased by 75% =
33. 33.325 decreased by 40% =
34. 34.500 decreased by 10% =
35. 35.65 increased by 40% =
36. 36.460 increased by 5% =
37. 37.80 increased by 15% =
38. 38.425 decreased by 12% =
39. 39.230 increased by 10% =
40. 40.588 decreased by 50% =

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