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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 653 · 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. 1.15% of 370 =
  2. 2.15% of 770 =
  3. 3.5% of 60 =
  4. 4.25% of 250 =
  5. 5.15% of 160 =
  6. 6.15% of 600 =
  7. 7.5% of 70 =
  8. 8.1% of 560 =
  9. 9.25% of 470 =
  10. 10.5% of 30 =
  11. 11.20% of 740 =
  12. 12.10% of 690 =
  13. 13.20% of 240 =
  14. 14.25% of 370 =
  15. 15.20% of 150 =
  16. 16.5% of 240 =
  17. 17.1% of 540 =
  18. 18.20% of 700 =
  19. 19.1% of 730 =
  20. 20.50% of 340 =
  21. 21.25% of 260 =
  22. 22.15% of 830 =
  23. 23.5% of 840 =
  24. 24.1% of 150 =
  25. 25.50% of 570 =
  26. 26.10% of 230 =
  27. 27.25% of 220 =
  28. 28.5% of 580 =
  29. 29.15% of 300 =
  30. 30.25% of 70 =
  31. 31.20% of 790 =
  32. 32.5% of 180 =
  33. 33.5% of 450 =
  34. 34.50% of 510 =
  35. 35.50% of 370 =
  36. 36.5% of 500 =
  37. 37.15% of 120 =
  38. 38.25% of 680 =
  39. 39.5% of 100 =
  40. 40.10% of 200 =

Answer key

  1. 55.5
  2. 115.5
  3. 3
  4. 62.5
  5. 24
  6. 90
  7. 3.5
  8. 5.6
  9. 117.5
  10. 1.5
  11. 148
  12. 69
  13. 48
  14. 92.5
  15. 30
  16. 12
  17. 5.4
  18. 140
  19. 7.3
  20. 170
  21. 65
  22. 124.5
  23. 42
  24. 1.5
  25. 285
  26. 23
  27. 55
  28. 29
  29. 45
  30. 17.5
  31. 158
  32. 9
  33. 22.5
  34. 255
  35. 185
  36. 25
  37. 18
  38. 170
  39. 5
  40. 20

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