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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 5 · 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 850 =
  2. 2.5% of 700 =
  3. 3.1% of 500 =
  4. 4.20% of 840 =
  5. 5.20% of 350 =
  6. 6.5% of 190 =
  7. 7.25% of 230 =
  8. 8.15% of 710 =
  9. 9.50% of 410 =
  10. 10.25% of 530 =
  11. 11.1% of 760 =
  12. 12.20% of 660 =
  13. 13.1% of 200 =
  14. 14.5% of 860 =
  15. 15.25% of 850 =
  16. 16.5% of 210 =
  17. 17.25% of 780 =
  18. 18.1% of 830 =
  19. 19.10% of 730 =
  20. 20.5% of 130 =
  21. 21.50% of 870 =
  22. 22.25% of 500 =
  23. 23.10% of 390 =
  24. 24.15% of 480 =
  25. 25.1% of 80 =
  26. 26.50% of 160 =
  27. 27.15% of 140 =
  28. 28.50% of 840 =
  29. 29.5% of 390 =
  30. 30.50% of 640 =
  31. 31.50% of 520 =
  32. 32.20% of 580 =
  33. 33.10% of 30 =
  34. 34.25% of 130 =
  35. 35.25% of 450 =
  36. 36.20% of 720 =
  37. 37.25% of 230 =
  38. 38.25% of 560 =
  39. 39.1% of 170 =
  40. 40.1% of 740 =

Answer key

  1. 170
  2. 35
  3. 5
  4. 168
  5. 70
  6. 9.5
  7. 57.5
  8. 106.5
  9. 205
  10. 132.5
  11. 7.6
  12. 132
  13. 2
  14. 43
  15. 212.5
  16. 10.5
  17. 195
  18. 8.3
  19. 73
  20. 6.5
  21. 435
  22. 125
  23. 39
  24. 72
  25. 0.8
  26. 80
  27. 21
  28. 420
  29. 19.5
  30. 320
  31. 260
  32. 116
  33. 3
  34. 32.5
  35. 112.5
  36. 144
  37. 57.5
  38. 140
  39. 1.7
  40. 7.4

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