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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 402 · 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. 1.50% of 770 =
  2. 2.50% of 690 =
  3. 3.1% of 30 =
  4. 4.1% of 890 =
  5. 5.10% of 220 =
  6. 6.25% of 650 =
  7. 7.50% of 150 =
  8. 8.5% of 220 =
  9. 9.20% of 130 =
  10. 10.1% of 600 =
  11. 11.50% of 20 =
  12. 12.15% of 430 =
  13. 13.20% of 180 =
  14. 14.25% of 100 =
  15. 15.20% of 490 =
  16. 16.15% of 530 =
  17. 17.15% of 890 =
  18. 18.20% of 350 =
  19. 19.10% of 670 =
  20. 20.10% of 750 =
  21. 21.1% of 140 =
  22. 22.50% of 130 =
  23. 23.20% of 750 =
  24. 24.50% of 880 =
  25. 25.5% of 400 =
  26. 26.20% of 360 =
  27. 27.50% of 240 =
  28. 28.5% of 230 =
  29. 29.1% of 180 =
  30. 30.50% of 900 =
  31. 31.15% of 630 =
  32. 32.1% of 310 =
  33. 33.20% of 250 =
  34. 34.20% of 480 =
  35. 35.20% of 110 =
  36. 36.15% of 180 =
  37. 37.15% of 860 =
  38. 38.25% of 270 =
  39. 39.5% of 330 =
  40. 40.15% of 430 =

Answer key

  1. 385
  2. 345
  3. 0.3
  4. 8.9
  5. 22
  6. 162.5
  7. 75
  8. 11
  9. 26
  10. 6
  11. 10
  12. 64.5
  13. 36
  14. 25
  15. 98
  16. 79.5
  17. 133.5
  18. 70
  19. 67
  20. 75
  21. 1.4
  22. 65
  23. 150
  24. 440
  25. 20
  26. 72
  27. 120
  28. 11.5
  29. 1.8
  30. 450
  31. 94.5
  32. 3.1
  33. 50
  34. 96
  35. 22
  36. 27
  37. 129
  38. 67.5
  39. 16.5
  40. 64.5

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