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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 342 · 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 570 =
  2. 2.10% of 740 =
  3. 3.10% of 700 =
  4. 4.5% of 690 =
  5. 5.10% of 620 =
  6. 6.10% of 880 =
  7. 7.15% of 230 =
  8. 8.20% of 770 =
  9. 9.50% of 290 =
  10. 10.5% of 110 =
  11. 11.25% of 430 =
  12. 12.20% of 290 =
  13. 13.25% of 360 =
  14. 14.5% of 760 =
  15. 15.25% of 110 =
  16. 16.15% of 820 =
  17. 17.50% of 700 =
  18. 18.5% of 880 =
  19. 19.25% of 430 =
  20. 20.1% of 140 =
  21. 21.1% of 750 =
  22. 22.5% of 290 =
  23. 23.50% of 790 =
  24. 24.20% of 300 =
  25. 25.10% of 710 =
  26. 26.5% of 860 =
  27. 27.15% of 880 =
  28. 28.10% of 280 =
  29. 29.15% of 680 =
  30. 30.1% of 240 =
  31. 31.25% of 180 =
  32. 32.5% of 630 =
  33. 33.1% of 410 =
  34. 34.15% of 830 =
  35. 35.1% of 150 =
  36. 36.10% of 260 =
  37. 37.1% of 350 =
  38. 38.20% of 770 =
  39. 39.1% of 790 =
  40. 40.5% of 360 =

Answer key

  1. 28.5
  2. 74
  3. 70
  4. 34.5
  5. 62
  6. 88
  7. 34.5
  8. 154
  9. 145
  10. 5.5
  11. 107.5
  12. 58
  13. 90
  14. 38
  15. 27.5
  16. 123
  17. 350
  18. 44
  19. 107.5
  20. 1.4
  21. 7.5
  22. 14.5
  23. 395
  24. 60
  25. 71
  26. 43
  27. 132
  28. 28
  29. 102
  30. 2.4
  31. 45
  32. 31.5
  33. 4.1
  34. 124.5
  35. 1.5
  36. 26
  37. 3.5
  38. 154
  39. 7.9
  40. 18

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