Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 392 · 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. 1.740 increased by 5% =
2. 2.705 decreased by 20% =
3. 3.395 decreased by 20% =
4. 4.750 decreased by 8% =
5. 5.100 decreased by 35% =
6. 6.90 decreased by 20% =
7. 7.100 increased by 12% =
8. 8.800 decreased by 8% =
9. 9.230 increased by 60% =
10. 10.395 increased by 20% =
11. 11.225 increased by 8% =
12. 12.140 decreased by 35% =
13. 13.325 increased by 12% =
14. 14.100 increased by 5% =
15. 15.560 increased by 10% =
16. 16.655 increased by 60% =
17. 17.60 increased by 10% =
18. 18.400 increased by 20% =
19. 19.330 decreased by 30% =
20. 20.390 decreased by 10% =
21. 21.700 increased by 15% =
22. 22.216 decreased by 25% =
23. 23.460 decreased by 5% =
24. 24.360 increased by 5% =
25. 25.620 increased by 15% =
26. 26.476 increased by 25% =
27. 27.300 decreased by 30% =
28. 28.600 decreased by 5% =
29. 29.588 increased by 25% =
30. 30.464 decreased by 25% =
31. 31.50 decreased by 60% =
32. 32.240 decreased by 5% =
33. 33.240 decreased by 5% =
34. 34.610 increased by 40% =
35. 35.430 increased by 40% =
36. 36.480 decreased by 40% =
37. 37.220 increased by 20% =
38. 38.120 decreased by 35% =
39. 39.500 decreased by 5% =
40. 40.488 decreased by 50% =

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