Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 146 · 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. 1.136 increased by 50% =
2. 2.140 decreased by 10% =
3. 3.104 increased by 50% =
4. 4.295 decreased by 60% =
5. 5.740 increased by 60% =
6. 6.180 decreased by 35% =
7. 7.725 increased by 12% =
8. 8.175 increased by 8% =
9. 9.532 increased by 25% =
10. 10.180 increased by 40% =
11. 11.740 decreased by 15% =
12. 12.100 decreased by 30% =
13. 13.180 increased by 35% =
14. 14.800 decreased by 5% =
15. 15.620 increased by 25% =
16. 16.525 decreased by 8% =
17. 17.630 increased by 30% =
18. 18.720 decreased by 10% =
19. 19.530 decreased by 50% =
20. 20.380 increased by 20% =
21. 21.396 increased by 75% =
22. 22.60 decreased by 35% =
23. 23.425 increased by 12% =
24. 24.672 decreased by 75% =
25. 25.536 decreased by 75% =
26. 26.165 decreased by 60% =
27. 27.240 decreased by 15% =
28. 28.280 decreased by 15% =
29. 29.705 decreased by 20% =
30. 30.110 decreased by 10% =
31. 31.65 decreased by 20% =
32. 32.75 decreased by 12% =
33. 33.80 decreased by 30% =
34. 34.375 increased by 12% =
35. 35.785 decreased by 40% =
36. 36.420 increased by 35% =
37. 37.225 decreased by 8% =
38. 38.270 increased by 10% =
39. 39.235 decreased by 20% =
40. 40.630 decreased by 10% =

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