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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 627 · 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 360 =
  2. 2.20% of 240 =
  3. 3.50% of 70 =
  4. 4.10% of 640 =
  5. 5.10% of 330 =
  6. 6.15% of 860 =
  7. 7.15% of 370 =
  8. 8.5% of 410 =
  9. 9.20% of 410 =
  10. 10.50% of 280 =
  11. 11.10% of 90 =
  12. 12.25% of 550 =
  13. 13.10% of 320 =
  14. 14.5% of 780 =
  15. 15.1% of 620 =
  16. 16.25% of 880 =
  17. 17.50% of 520 =
  18. 18.20% of 60 =
  19. 19.1% of 20 =
  20. 20.25% of 500 =
  21. 21.1% of 70 =
  22. 22.1% of 440 =
  23. 23.5% of 630 =
  24. 24.15% of 340 =
  25. 25.10% of 610 =
  26. 26.10% of 640 =
  27. 27.20% of 40 =
  28. 28.25% of 160 =
  29. 29.20% of 250 =
  30. 30.5% of 170 =
  31. 31.15% of 430 =
  32. 32.15% of 410 =
  33. 33.10% of 190 =
  34. 34.20% of 410 =
  35. 35.25% of 470 =
  36. 36.25% of 90 =
  37. 37.20% of 400 =
  38. 38.20% of 630 =
  39. 39.10% of 740 =
  40. 40.10% of 110 =

Answer key

  1. 72
  2. 48
  3. 35
  4. 64
  5. 33
  6. 129
  7. 55.5
  8. 20.5
  9. 82
  10. 140
  11. 9
  12. 137.5
  13. 32
  14. 39
  15. 6.2
  16. 220
  17. 260
  18. 12
  19. 0.2
  20. 125
  21. 0.7
  22. 4.4
  23. 31.5
  24. 51
  25. 61
  26. 64
  27. 8
  28. 40
  29. 50
  30. 8.5
  31. 64.5
  32. 61.5
  33. 19
  34. 82
  35. 117.5
  36. 22.5
  37. 80
  38. 126
  39. 74
  40. 11

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