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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 148 · 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. 1.25% of 660 =
  2. 2.15% of 280 =
  3. 3.10% of 150 =
  4. 4.10% of 60 =
  5. 5.20% of 400 =
  6. 6.20% of 260 =
  7. 7.1% of 690 =
  8. 8.5% of 740 =
  9. 9.50% of 730 =
  10. 10.5% of 780 =
  11. 11.15% of 800 =
  12. 12.50% of 840 =
  13. 13.25% of 340 =
  14. 14.25% of 580 =
  15. 15.5% of 630 =
  16. 16.5% of 180 =
  17. 17.25% of 810 =
  18. 18.5% of 640 =
  19. 19.20% of 670 =
  20. 20.25% of 450 =
  21. 21.20% of 840 =
  22. 22.20% of 430 =
  23. 23.5% of 480 =
  24. 24.5% of 210 =
  25. 25.10% of 200 =
  26. 26.50% of 900 =
  27. 27.25% of 690 =
  28. 28.10% of 330 =
  29. 29.25% of 530 =
  30. 30.15% of 90 =
  31. 31.15% of 650 =
  32. 32.50% of 330 =
  33. 33.1% of 240 =
  34. 34.5% of 200 =
  35. 35.5% of 520 =
  36. 36.25% of 710 =
  37. 37.25% of 300 =
  38. 38.20% of 220 =
  39. 39.5% of 110 =
  40. 40.15% of 650 =

Answer key

  1. 165
  2. 42
  3. 15
  4. 6
  5. 80
  6. 52
  7. 6.9
  8. 37
  9. 365
  10. 39
  11. 120
  12. 420
  13. 85
  14. 145
  15. 31.5
  16. 9
  17. 202.5
  18. 32
  19. 134
  20. 112.5
  21. 168
  22. 86
  23. 24
  24. 10.5
  25. 20
  26. 450
  27. 172.5
  28. 33
  29. 132.5
  30. 13.5
  31. 97.5
  32. 165
  33. 2.4
  34. 10
  35. 26
  36. 177.5
  37. 75
  38. 44
  39. 5.5
  40. 97.5

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