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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 554 · 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 140 =
  2. 2.5% of 650 =
  3. 3.1% of 90 =
  4. 4.5% of 400 =
  5. 5.5% of 650 =
  6. 6.5% of 350 =
  7. 7.1% of 300 =
  8. 8.10% of 790 =
  9. 9.1% of 310 =
  10. 10.15% of 310 =
  11. 11.1% of 490 =
  12. 12.15% of 720 =
  13. 13.10% of 140 =
  14. 14.15% of 860 =
  15. 15.10% of 20 =
  16. 16.5% of 680 =
  17. 17.50% of 80 =
  18. 18.20% of 240 =
  19. 19.1% of 140 =
  20. 20.25% of 290 =
  21. 21.10% of 210 =
  22. 22.10% of 220 =
  23. 23.25% of 150 =
  24. 24.20% of 360 =
  25. 25.20% of 570 =
  26. 26.5% of 590 =
  27. 27.50% of 260 =
  28. 28.10% of 270 =
  29. 29.15% of 150 =
  30. 30.25% of 490 =
  31. 31.20% of 310 =
  32. 32.25% of 240 =
  33. 33.15% of 510 =
  34. 34.10% of 480 =
  35. 35.10% of 100 =
  36. 36.10% of 110 =
  37. 37.5% of 200 =
  38. 38.5% of 450 =
  39. 39.10% of 710 =
  40. 40.50% of 470 =

Answer key

  1. 7
  2. 32.5
  3. 0.9
  4. 20
  5. 32.5
  6. 17.5
  7. 3
  8. 79
  9. 3.1
  10. 46.5
  11. 4.9
  12. 108
  13. 14
  14. 129
  15. 2
  16. 34
  17. 40
  18. 48
  19. 1.4
  20. 72.5
  21. 21
  22. 22
  23. 37.5
  24. 72
  25. 114
  26. 29.5
  27. 130
  28. 27
  29. 22.5
  30. 122.5
  31. 62
  32. 60
  33. 76.5
  34. 48
  35. 10
  36. 11
  37. 10
  38. 22.5
  39. 71
  40. 235

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