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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 477 · 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 120 =
  2. 2.5% of 740 =
  3. 3.15% of 650 =
  4. 4.25% of 100 =
  5. 5.10% of 370 =
  6. 6.10% of 160 =
  7. 7.20% of 70 =
  8. 8.10% of 280 =
  9. 9.1% of 350 =
  10. 10.5% of 160 =
  11. 11.15% of 20 =
  12. 12.15% of 90 =
  13. 13.1% of 560 =
  14. 14.25% of 490 =
  15. 15.50% of 240 =
  16. 16.10% of 470 =
  17. 17.50% of 340 =
  18. 18.50% of 620 =
  19. 19.10% of 60 =
  20. 20.5% of 540 =
  21. 21.20% of 360 =
  22. 22.25% of 660 =
  23. 23.20% of 760 =
  24. 24.15% of 320 =
  25. 25.20% of 660 =
  26. 26.5% of 60 =
  27. 27.1% of 360 =
  28. 28.50% of 210 =
  29. 29.10% of 860 =
  30. 30.25% of 160 =
  31. 31.5% of 300 =
  32. 32.50% of 450 =
  33. 33.25% of 790 =
  34. 34.50% of 630 =
  35. 35.20% of 350 =
  36. 36.5% of 200 =
  37. 37.5% of 370 =
  38. 38.10% of 150 =
  39. 39.1% of 230 =
  40. 40.1% of 230 =

Answer key

  1. 6
  2. 37
  3. 97.5
  4. 25
  5. 37
  6. 16
  7. 14
  8. 28
  9. 3.5
  10. 8
  11. 3
  12. 13.5
  13. 5.6
  14. 122.5
  15. 120
  16. 47
  17. 170
  18. 310
  19. 6
  20. 27
  21. 72
  22. 165
  23. 152
  24. 48
  25. 132
  26. 3
  27. 3.6
  28. 105
  29. 86
  30. 40
  31. 15
  32. 225
  33. 197.5
  34. 315
  35. 70
  36. 10
  37. 18.5
  38. 15
  39. 2.3
  40. 2.3

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