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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 390 · 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 600 =
  2. 2.15% of 640 =
  3. 3.5% of 90 =
  4. 4.25% of 30 =
  5. 5.10% of 670 =
  6. 6.1% of 890 =
  7. 7.10% of 270 =
  8. 8.10% of 740 =
  9. 9.50% of 790 =
  10. 10.5% of 370 =
  11. 11.5% of 380 =
  12. 12.10% of 450 =
  13. 13.15% of 550 =
  14. 14.10% of 360 =
  15. 15.20% of 630 =
  16. 16.25% of 610 =
  17. 17.10% of 710 =
  18. 18.25% of 650 =
  19. 19.5% of 180 =
  20. 20.1% of 350 =
  21. 21.5% of 570 =
  22. 22.50% of 770 =
  23. 23.1% of 810 =
  24. 24.10% of 220 =
  25. 25.50% of 450 =
  26. 26.5% of 800 =
  27. 27.50% of 410 =
  28. 28.25% of 380 =
  29. 29.5% of 660 =
  30. 30.15% of 320 =
  31. 31.1% of 300 =
  32. 32.5% of 80 =
  33. 33.15% of 900 =
  34. 34.50% of 500 =
  35. 35.15% of 40 =
  36. 36.10% of 580 =
  37. 37.10% of 820 =
  38. 38.10% of 150 =
  39. 39.10% of 100 =
  40. 40.10% of 230 =

Answer key

  1. 30
  2. 96
  3. 4.5
  4. 7.5
  5. 67
  6. 8.9
  7. 27
  8. 74
  9. 395
  10. 18.5
  11. 19
  12. 45
  13. 82.5
  14. 36
  15. 126
  16. 152.5
  17. 71
  18. 162.5
  19. 9
  20. 3.5
  21. 28.5
  22. 385
  23. 8.1
  24. 22
  25. 225
  26. 40
  27. 205
  28. 95
  29. 33
  30. 48
  31. 3
  32. 4
  33. 135
  34. 250
  35. 6
  36. 58
  37. 82
  38. 15
  39. 10
  40. 23

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