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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 115 · 40 questions
TalentJR

The fast method (Build from 10%): 10%: divide by 10. 1%: divide by 100. 5% = half of 10%, 20% = double 10%, 15% = 10% + 5%. 50% = half, 25% = half of a half.

NameDateTime takenScore ___ / 40
  1. 1.5% of 20 =
  2. 2.20% of 630 =
  3. 3.5% of 100 =
  4. 4.20% of 430 =
  5. 5.5% of 290 =
  6. 6.5% of 570 =
  7. 7.15% of 350 =
  8. 8.5% of 490 =
  9. 9.10% of 450 =
  10. 10.5% of 110 =
  11. 11.10% of 140 =
  12. 12.10% of 250 =
  13. 13.25% of 100 =
  14. 14.1% of 540 =
  15. 15.25% of 590 =
  16. 16.10% of 650 =
  17. 17.1% of 290 =
  18. 18.15% of 670 =
  19. 19.20% of 100 =
  20. 20.5% of 650 =
  21. 21.20% of 720 =
  22. 22.15% of 830 =
  23. 23.50% of 130 =
  24. 24.10% of 50 =
  25. 25.15% of 280 =
  26. 26.20% of 130 =
  27. 27.10% of 220 =
  28. 28.25% of 730 =
  29. 29.1% of 330 =
  30. 30.20% of 340 =
  31. 31.25% of 210 =
  32. 32.15% of 190 =
  33. 33.15% of 740 =
  34. 34.5% of 230 =
  35. 35.1% of 380 =
  36. 36.15% of 440 =
  37. 37.5% of 570 =
  38. 38.15% of 250 =
  39. 39.15% of 520 =
  40. 40.10% of 470 =

Answer key

  1. 1
  2. 126
  3. 5
  4. 86
  5. 14.5
  6. 28.5
  7. 52.5
  8. 24.5
  9. 45
  10. 5.5
  11. 14
  12. 25
  13. 25
  14. 5.4
  15. 147.5
  16. 65
  17. 2.9
  18. 100.5
  19. 20
  20. 32.5
  21. 144
  22. 124.5
  23. 65
  24. 5
  25. 42
  26. 26
  27. 22
  28. 182.5
  29. 3.3
  30. 68
  31. 52.5
  32. 28.5
  33. 111
  34. 11.5
  35. 3.8
  36. 66
  37. 28.5
  38. 37.5
  39. 78
  40. 47

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