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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 817 · 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 530 =
  2. 2.10% of 640 =
  3. 3.1% of 100 =
  4. 4.20% of 110 =
  5. 5.25% of 110 =
  6. 6.1% of 440 =
  7. 7.10% of 360 =
  8. 8.5% of 110 =
  9. 9.25% of 600 =
  10. 10.20% of 800 =
  11. 11.1% of 180 =
  12. 12.5% of 740 =
  13. 13.5% of 750 =
  14. 14.50% of 630 =
  15. 15.50% of 310 =
  16. 16.50% of 180 =
  17. 17.1% of 400 =
  18. 18.20% of 580 =
  19. 19.15% of 730 =
  20. 20.15% of 430 =
  21. 21.20% of 240 =
  22. 22.1% of 40 =
  23. 23.25% of 780 =
  24. 24.1% of 190 =
  25. 25.50% of 750 =
  26. 26.5% of 400 =
  27. 27.25% of 350 =
  28. 28.25% of 600 =
  29. 29.10% of 200 =
  30. 30.10% of 470 =
  31. 31.20% of 40 =
  32. 32.20% of 100 =
  33. 33.5% of 560 =
  34. 34.5% of 420 =
  35. 35.1% of 230 =
  36. 36.5% of 880 =
  37. 37.1% of 830 =
  38. 38.20% of 370 =
  39. 39.1% of 410 =
  40. 40.50% of 570 =

Answer key

  1. 26.5
  2. 64
  3. 1
  4. 22
  5. 27.5
  6. 4.4
  7. 36
  8. 5.5
  9. 150
  10. 160
  11. 1.8
  12. 37
  13. 37.5
  14. 315
  15. 155
  16. 90
  17. 4
  18. 116
  19. 109.5
  20. 64.5
  21. 48
  22. 0.4
  23. 195
  24. 1.9
  25. 375
  26. 20
  27. 87.5
  28. 150
  29. 20
  30. 47
  31. 8
  32. 20
  33. 28
  34. 21
  35. 2.3
  36. 44
  37. 8.3
  38. 74
  39. 4.1
  40. 285

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