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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 362 · 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. 1.10% of 270 =
  2. 2.25% of 530 =
  3. 3.50% of 440 =
  4. 4.1% of 110 =
  5. 5.5% of 500 =
  6. 6.15% of 550 =
  7. 7.5% of 490 =
  8. 8.1% of 130 =
  9. 9.5% of 220 =
  10. 10.25% of 690 =
  11. 11.50% of 160 =
  12. 12.10% of 400 =
  13. 13.1% of 410 =
  14. 14.20% of 300 =
  15. 15.20% of 50 =
  16. 16.15% of 600 =
  17. 17.50% of 320 =
  18. 18.1% of 640 =
  19. 19.5% of 800 =
  20. 20.5% of 630 =
  21. 21.15% of 330 =
  22. 22.15% of 520 =
  23. 23.25% of 820 =
  24. 24.20% of 840 =
  25. 25.20% of 140 =
  26. 26.10% of 630 =
  27. 27.10% of 860 =
  28. 28.10% of 210 =
  29. 29.1% of 660 =
  30. 30.10% of 200 =
  31. 31.5% of 210 =
  32. 32.15% of 640 =
  33. 33.1% of 120 =
  34. 34.50% of 590 =
  35. 35.20% of 70 =
  36. 36.50% of 290 =
  37. 37.20% of 510 =
  38. 38.15% of 140 =
  39. 39.5% of 300 =
  40. 40.10% of 620 =

Answer key

  1. 27
  2. 132.5
  3. 220
  4. 1.1
  5. 25
  6. 82.5
  7. 24.5
  8. 1.3
  9. 11
  10. 172.5
  11. 80
  12. 40
  13. 4.1
  14. 60
  15. 10
  16. 90
  17. 160
  18. 6.4
  19. 40
  20. 31.5
  21. 49.5
  22. 78
  23. 205
  24. 168
  25. 28
  26. 63
  27. 86
  28. 21
  29. 6.6
  30. 20
  31. 10.5
  32. 96
  33. 1.2
  34. 295
  35. 14
  36. 145
  37. 102
  38. 21
  39. 15
  40. 62

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