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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 141 · 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 90 =
  2. 2.5% of 500 =
  3. 3.15% of 230 =
  4. 4.5% of 840 =
  5. 5.10% of 650 =
  6. 6.5% of 700 =
  7. 7.5% of 610 =
  8. 8.25% of 90 =
  9. 9.20% of 740 =
  10. 10.15% of 470 =
  11. 11.15% of 780 =
  12. 12.25% of 40 =
  13. 13.1% of 800 =
  14. 14.15% of 120 =
  15. 15.15% of 550 =
  16. 16.5% of 70 =
  17. 17.15% of 500 =
  18. 18.50% of 110 =
  19. 19.50% of 690 =
  20. 20.50% of 530 =
  21. 21.5% of 830 =
  22. 22.50% of 790 =
  23. 23.20% of 350 =
  24. 24.5% of 860 =
  25. 25.10% of 240 =
  26. 26.1% of 380 =
  27. 27.25% of 30 =
  28. 28.15% of 730 =
  29. 29.10% of 300 =
  30. 30.1% of 680 =
  31. 31.5% of 280 =
  32. 32.50% of 620 =
  33. 33.15% of 260 =
  34. 34.5% of 550 =
  35. 35.1% of 330 =
  36. 36.5% of 200 =
  37. 37.50% of 180 =
  38. 38.15% of 250 =
  39. 39.20% of 190 =
  40. 40.15% of 110 =

Answer key

  1. 18
  2. 25
  3. 34.5
  4. 42
  5. 65
  6. 35
  7. 30.5
  8. 22.5
  9. 148
  10. 70.5
  11. 117
  12. 10
  13. 8
  14. 18
  15. 82.5
  16. 3.5
  17. 75
  18. 55
  19. 345
  20. 265
  21. 41.5
  22. 395
  23. 70
  24. 43
  25. 24
  26. 3.8
  27. 7.5
  28. 109.5
  29. 30
  30. 6.8
  31. 14
  32. 310
  33. 39
  34. 27.5
  35. 3.3
  36. 10
  37. 90
  38. 37.5
  39. 38
  40. 16.5

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