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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 809 · 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. 1.25% of 120 =
  2. 2.50% of 510 =
  3. 3.10% of 370 =
  4. 4.5% of 380 =
  5. 5.20% of 210 =
  6. 6.1% of 680 =
  7. 7.5% of 870 =
  8. 8.5% of 720 =
  9. 9.50% of 100 =
  10. 10.15% of 620 =
  11. 11.50% of 530 =
  12. 12.25% of 360 =
  13. 13.5% of 20 =
  14. 14.50% of 110 =
  15. 15.20% of 70 =
  16. 16.25% of 410 =
  17. 17.20% of 790 =
  18. 18.1% of 410 =
  19. 19.15% of 320 =
  20. 20.50% of 150 =
  21. 21.20% of 40 =
  22. 22.15% of 410 =
  23. 23.15% of 170 =
  24. 24.25% of 80 =
  25. 25.20% of 440 =
  26. 26.20% of 430 =
  27. 27.50% of 170 =
  28. 28.5% of 700 =
  29. 29.10% of 650 =
  30. 30.15% of 670 =
  31. 31.20% of 100 =
  32. 32.20% of 150 =
  33. 33.1% of 160 =
  34. 34.10% of 670 =
  35. 35.15% of 480 =
  36. 36.25% of 400 =
  37. 37.1% of 690 =
  38. 38.5% of 70 =
  39. 39.15% of 300 =
  40. 40.5% of 370 =

Answer key

  1. 30
  2. 255
  3. 37
  4. 19
  5. 42
  6. 6.8
  7. 43.5
  8. 36
  9. 50
  10. 93
  11. 265
  12. 90
  13. 1
  14. 55
  15. 14
  16. 102.5
  17. 158
  18. 4.1
  19. 48
  20. 75
  21. 8
  22. 61.5
  23. 25.5
  24. 20
  25. 88
  26. 86
  27. 85
  28. 35
  29. 65
  30. 100.5
  31. 20
  32. 30
  33. 1.6
  34. 67
  35. 72
  36. 100
  37. 6.9
  38. 3.5
  39. 45
  40. 18.5

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