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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 113 · 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 870 =
  2. 2.25% of 860 =
  3. 3.1% of 650 =
  4. 4.5% of 740 =
  5. 5.15% of 110 =
  6. 6.5% of 210 =
  7. 7.50% of 260 =
  8. 8.5% of 350 =
  9. 9.5% of 620 =
  10. 10.50% of 70 =
  11. 11.20% of 670 =
  12. 12.1% of 720 =
  13. 13.5% of 140 =
  14. 14.50% of 260 =
  15. 15.15% of 440 =
  16. 16.25% of 270 =
  17. 17.1% of 850 =
  18. 18.20% of 620 =
  19. 19.20% of 770 =
  20. 20.10% of 240 =
  21. 21.25% of 560 =
  22. 22.50% of 160 =
  23. 23.15% of 630 =
  24. 24.25% of 210 =
  25. 25.50% of 350 =
  26. 26.20% of 320 =
  27. 27.1% of 280 =
  28. 28.5% of 200 =
  29. 29.5% of 150 =
  30. 30.1% of 150 =
  31. 31.1% of 110 =
  32. 32.10% of 540 =
  33. 33.5% of 750 =
  34. 34.1% of 840 =
  35. 35.15% of 120 =
  36. 36.10% of 660 =
  37. 37.10% of 580 =
  38. 38.25% of 270 =
  39. 39.20% of 160 =
  40. 40.5% of 110 =

Answer key

  1. 174
  2. 215
  3. 6.5
  4. 37
  5. 16.5
  6. 10.5
  7. 130
  8. 17.5
  9. 31
  10. 35
  11. 134
  12. 7.2
  13. 7
  14. 130
  15. 66
  16. 67.5
  17. 8.5
  18. 124
  19. 154
  20. 24
  21. 140
  22. 80
  23. 94.5
  24. 52.5
  25. 175
  26. 64
  27. 2.8
  28. 10
  29. 7.5
  30. 1.5
  31. 1.1
  32. 54
  33. 37.5
  34. 8.4
  35. 18
  36. 66
  37. 58
  38. 67.5
  39. 32
  40. 5.5

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