Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 695 · 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. 1.180 increased by 35% =
2. 2.500 decreased by 25% =
3. 3.100 decreased by 10% =
4. 4.624 increased by 75% =
5. 5.740 increased by 5% =
6. 6.70 decreased by 20% =
7. 7.190 decreased by 20% =
8. 8.320 decreased by 15% =
9. 9.188 increased by 50% =
10. 10.740 increased by 20% =
11. 11.550 increased by 20% =
12. 12.650 increased by 30% =
13. 13.625 decreased by 20% =
14. 14.740 increased by 35% =
15. 15.340 increased by 50% =
16. 16.50 decreased by 8% =
17. 17.680 decreased by 15% =
18. 18.340 decreased by 40% =
19. 19.65 increased by 40% =
20. 20.710 decreased by 30% =
21. 21.40 decreased by 15% =
22. 22.280 increased by 35% =
23. 23.705 increased by 60% =
24. 24.770 decreased by 10% =
25. 25.640 decreased by 10% =
26. 26.610 decreased by 30% =
27. 27.200 increased by 12% =
28. 28.320 increased by 40% =
29. 29.76 increased by 50% =
30. 30.730 increased by 50% =
31. 31.380 increased by 75% =
32. 32.215 decreased by 20% =
33. 33.415 decreased by 20% =
34. 34.675 decreased by 20% =
35. 35.60 increased by 75% =
36. 36.780 decreased by 5% =
37. 37.60 decreased by 30% =
38. 38.80 decreased by 5% =
39. 39.40 increased by 35% =
40. 40.142 decreased by 50% =

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