Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 700 · 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. 1.610 increased by 30% =
2. 2.546 decreased by 50% =
3. 3.75 increased by 8% =
4. 4.618 increased by 50% =
5. 5.380 decreased by 10% =
6. 6.380 increased by 10% =
7. 7.655 decreased by 20% =
8. 8.360 decreased by 25% =
9. 9.594 decreased by 50% =
10. 10.600 increased by 20% =
11. 11.480 increased by 15% =
12. 12.725 increased by 60% =
13. 13.468 decreased by 75% =
14. 14.800 increased by 15% =
15. 15.95 decreased by 60% =
16. 16.340 increased by 20% =
17. 17.610 increased by 30% =
18. 18.775 decreased by 8% =
19. 19.740 increased by 15% =
20. 20.140 increased by 20% =
21. 21.620 increased by 50% =
22. 22.688 decreased by 25% =
23. 23.650 increased by 8% =
24. 24.360 increased by 15% =
25. 25.550 decreased by 10% =
26. 26.50 increased by 40% =
27. 27.380 decreased by 15% =
28. 28.44 decreased by 75% =
29. 29.695 increased by 20% =
30. 30.650 increased by 10% =
31. 31.375 decreased by 20% =
32. 32.128 increased by 75% =
33. 33.240 increased by 5% =
34. 34.700 decreased by 35% =
35. 35.195 increased by 20% =
36. 36.80 decreased by 5% =
37. 37.200 increased by 15% =
38. 38.640 decreased by 10% =
39. 39.668 decreased by 75% =
40. 40.740 decreased by 40% =

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths