Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 144 · 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. 1.500 decreased by 40% =
2. 2.350 decreased by 8% =
3. 3.60 increased by 5% =
4. 4.740 increased by 15% =
5. 5.500 decreased by 5% =
6. 6.250 increased by 8% =
7. 7.436 increased by 25% =
8. 8.665 decreased by 60% =
9. 9.320 increased by 75% =
10. 10.375 decreased by 8% =
11. 11.390 decreased by 60% =
12. 12.190 increased by 10% =
13. 13.80 decreased by 40% =
14. 14.600 decreased by 15% =
15. 15.200 increased by 12% =
16. 16.100 increased by 20% =
17. 17.616 decreased by 25% =
18. 18.170 decreased by 60% =
19. 19.755 decreased by 20% =
20. 20.544 increased by 25% =
21. 21.540 increased by 35% =
22. 22.455 decreased by 60% =
23. 23.100 decreased by 5% =
24. 24.640 decreased by 20% =
25. 25.330 increased by 10% =
26. 26.380 decreased by 60% =
27. 27.490 decreased by 40% =
28. 28.225 decreased by 8% =
29. 29.556 increased by 75% =
30. 30.575 decreased by 60% =
31. 31.120 decreased by 5% =
32. 32.370 increased by 30% =
33. 33.80 decreased by 35% =
34. 34.644 increased by 25% =
35. 35.580 decreased by 10% =
36. 36.460 decreased by 35% =
37. 37.755 decreased by 20% =
38. 38.520 increased by 5% =
39. 39.200 increased by 10% =
40. 40.90 increased by 30% =

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