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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 398 · 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 70 =
  2. 2.5% of 830 =
  3. 3.20% of 840 =
  4. 4.15% of 350 =
  5. 5.1% of 80 =
  6. 6.50% of 680 =
  7. 7.50% of 160 =
  8. 8.5% of 710 =
  9. 9.20% of 110 =
  10. 10.5% of 720 =
  11. 11.25% of 320 =
  12. 12.50% of 650 =
  13. 13.1% of 120 =
  14. 14.50% of 240 =
  15. 15.5% of 510 =
  16. 16.1% of 70 =
  17. 17.20% of 770 =
  18. 18.5% of 730 =
  19. 19.1% of 180 =
  20. 20.15% of 660 =
  21. 21.5% of 70 =
  22. 22.50% of 820 =
  23. 23.25% of 420 =
  24. 24.1% of 240 =
  25. 25.25% of 120 =
  26. 26.25% of 70 =
  27. 27.20% of 50 =
  28. 28.15% of 710 =
  29. 29.10% of 830 =
  30. 30.25% of 120 =
  31. 31.25% of 70 =
  32. 32.5% of 130 =
  33. 33.10% of 790 =
  34. 34.25% of 40 =
  35. 35.10% of 440 =
  36. 36.5% of 50 =
  37. 37.50% of 250 =
  38. 38.10% of 740 =
  39. 39.5% of 220 =
  40. 40.15% of 770 =

Answer key

  1. 3.5
  2. 41.5
  3. 168
  4. 52.5
  5. 0.8
  6. 340
  7. 80
  8. 35.5
  9. 22
  10. 36
  11. 80
  12. 325
  13. 1.2
  14. 120
  15. 25.5
  16. 0.7
  17. 154
  18. 36.5
  19. 1.8
  20. 99
  21. 3.5
  22. 410
  23. 105
  24. 2.4
  25. 30
  26. 17.5
  27. 10
  28. 106.5
  29. 83
  30. 30
  31. 17.5
  32. 6.5
  33. 79
  34. 10
  35. 44
  36. 2.5
  37. 125
  38. 74
  39. 11
  40. 115.5

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