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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 144 · 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 410 =
  2. 2.5% of 790 =
  3. 3.25% of 30 =
  4. 4.10% of 610 =
  5. 5.5% of 20 =
  6. 6.10% of 80 =
  7. 7.10% of 160 =
  8. 8.20% of 370 =
  9. 9.20% of 220 =
  10. 10.5% of 420 =
  11. 11.25% of 790 =
  12. 12.5% of 310 =
  13. 13.1% of 140 =
  14. 14.10% of 510 =
  15. 15.50% of 40 =
  16. 16.15% of 110 =
  17. 17.1% of 460 =
  18. 18.1% of 20 =
  19. 19.25% of 830 =
  20. 20.15% of 810 =
  21. 21.25% of 630 =
  22. 22.20% of 780 =
  23. 23.5% of 130 =
  24. 24.50% of 720 =
  25. 25.1% of 680 =
  26. 26.5% of 200 =
  27. 27.5% of 520 =
  28. 28.15% of 220 =
  29. 29.20% of 100 =
  30. 30.20% of 100 =
  31. 31.20% of 420 =
  32. 32.1% of 880 =
  33. 33.15% of 280 =
  34. 34.20% of 180 =
  35. 35.20% of 770 =
  36. 36.20% of 440 =
  37. 37.15% of 820 =
  38. 38.1% of 180 =
  39. 39.50% of 390 =
  40. 40.1% of 240 =

Answer key

  1. 102.5
  2. 39.5
  3. 7.5
  4. 61
  5. 1
  6. 8
  7. 16
  8. 74
  9. 44
  10. 21
  11. 197.5
  12. 15.5
  13. 1.4
  14. 51
  15. 20
  16. 16.5
  17. 4.6
  18. 0.2
  19. 207.5
  20. 121.5
  21. 157.5
  22. 156
  23. 6.5
  24. 360
  25. 6.8
  26. 10
  27. 26
  28. 33
  29. 20
  30. 20
  31. 84
  32. 8.8
  33. 42
  34. 36
  35. 154
  36. 88
  37. 123
  38. 1.8
  39. 195
  40. 2.4

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