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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 587 · 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. 1.20% of 780 =
  2. 2.5% of 840 =
  3. 3.25% of 30 =
  4. 4.1% of 520 =
  5. 5.20% of 210 =
  6. 6.10% of 700 =
  7. 7.1% of 90 =
  8. 8.50% of 670 =
  9. 9.1% of 220 =
  10. 10.50% of 680 =
  11. 11.20% of 370 =
  12. 12.5% of 520 =
  13. 13.15% of 410 =
  14. 14.10% of 270 =
  15. 15.50% of 80 =
  16. 16.20% of 560 =
  17. 17.15% of 790 =
  18. 18.50% of 270 =
  19. 19.50% of 80 =
  20. 20.1% of 510 =
  21. 21.15% of 310 =
  22. 22.10% of 170 =
  23. 23.15% of 700 =
  24. 24.25% of 450 =
  25. 25.15% of 100 =
  26. 26.1% of 240 =
  27. 27.10% of 370 =
  28. 28.1% of 740 =
  29. 29.20% of 60 =
  30. 30.25% of 210 =
  31. 31.50% of 480 =
  32. 32.25% of 510 =
  33. 33.50% of 840 =
  34. 34.1% of 820 =
  35. 35.1% of 320 =
  36. 36.50% of 130 =
  37. 37.10% of 80 =
  38. 38.10% of 470 =
  39. 39.5% of 770 =
  40. 40.10% of 170 =

Answer key

  1. 156
  2. 42
  3. 7.5
  4. 5.2
  5. 42
  6. 70
  7. 0.9
  8. 335
  9. 2.2
  10. 340
  11. 74
  12. 26
  13. 61.5
  14. 27
  15. 40
  16. 112
  17. 118.5
  18. 135
  19. 40
  20. 5.1
  21. 46.5
  22. 17
  23. 105
  24. 112.5
  25. 15
  26. 2.4
  27. 37
  28. 7.4
  29. 12
  30. 52.5
  31. 240
  32. 127.5
  33. 420
  34. 8.2
  35. 3.2
  36. 65
  37. 8
  38. 47
  39. 38.5
  40. 17

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