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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 765 · 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 470 =
  2. 2.50% of 590 =
  3. 3.10% of 680 =
  4. 4.25% of 440 =
  5. 5.5% of 630 =
  6. 6.1% of 420 =
  7. 7.15% of 120 =
  8. 8.1% of 180 =
  9. 9.50% of 430 =
  10. 10.15% of 620 =
  11. 11.10% of 760 =
  12. 12.1% of 540 =
  13. 13.1% of 600 =
  14. 14.10% of 320 =
  15. 15.10% of 820 =
  16. 16.25% of 250 =
  17. 17.20% of 680 =
  18. 18.5% of 70 =
  19. 19.15% of 860 =
  20. 20.25% of 180 =
  21. 21.50% of 370 =
  22. 22.10% of 80 =
  23. 23.10% of 150 =
  24. 24.50% of 820 =
  25. 25.25% of 20 =
  26. 26.10% of 630 =
  27. 27.20% of 170 =
  28. 28.50% of 620 =
  29. 29.1% of 720 =
  30. 30.25% of 280 =
  31. 31.25% of 50 =
  32. 32.15% of 600 =
  33. 33.15% of 870 =
  34. 34.10% of 30 =
  35. 35.1% of 50 =
  36. 36.20% of 160 =
  37. 37.1% of 640 =
  38. 38.15% of 40 =
  39. 39.1% of 510 =
  40. 40.10% of 260 =

Answer key

  1. 94
  2. 295
  3. 68
  4. 110
  5. 31.5
  6. 4.2
  7. 18
  8. 1.8
  9. 215
  10. 93
  11. 76
  12. 5.4
  13. 6
  14. 32
  15. 82
  16. 62.5
  17. 136
  18. 3.5
  19. 129
  20. 45
  21. 185
  22. 8
  23. 15
  24. 410
  25. 5
  26. 63
  27. 34
  28. 310
  29. 7.2
  30. 70
  31. 12.5
  32. 90
  33. 130.5
  34. 3
  35. 0.5
  36. 32
  37. 6.4
  38. 6
  39. 5.1
  40. 26

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