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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 592 · 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 20 =
  2. 2.25% of 680 =
  3. 3.20% of 540 =
  4. 4.1% of 180 =
  5. 5.15% of 30 =
  6. 6.10% of 640 =
  7. 7.25% of 320 =
  8. 8.50% of 540 =
  9. 9.20% of 850 =
  10. 10.25% of 130 =
  11. 11.15% of 860 =
  12. 12.20% of 110 =
  13. 13.15% of 560 =
  14. 14.1% of 740 =
  15. 15.1% of 320 =
  16. 16.5% of 540 =
  17. 17.50% of 560 =
  18. 18.10% of 440 =
  19. 19.15% of 160 =
  20. 20.20% of 810 =
  21. 21.15% of 250 =
  22. 22.15% of 500 =
  23. 23.5% of 310 =
  24. 24.25% of 480 =
  25. 25.1% of 150 =
  26. 26.25% of 600 =
  27. 27.10% of 160 =
  28. 28.5% of 270 =
  29. 29.1% of 610 =
  30. 30.25% of 210 =
  31. 31.1% of 200 =
  32. 32.25% of 390 =
  33. 33.5% of 70 =
  34. 34.5% of 630 =
  35. 35.10% of 230 =
  36. 36.1% of 820 =
  37. 37.10% of 800 =
  38. 38.15% of 240 =
  39. 39.1% of 110 =
  40. 40.15% of 620 =

Answer key

  1. 5
  2. 170
  3. 108
  4. 1.8
  5. 4.5
  6. 64
  7. 80
  8. 270
  9. 170
  10. 32.5
  11. 129
  12. 22
  13. 84
  14. 7.4
  15. 3.2
  16. 27
  17. 280
  18. 44
  19. 24
  20. 162
  21. 37.5
  22. 75
  23. 15.5
  24. 120
  25. 1.5
  26. 150
  27. 16
  28. 13.5
  29. 6.1
  30. 52.5
  31. 2
  32. 97.5
  33. 3.5
  34. 31.5
  35. 23
  36. 8.2
  37. 80
  38. 36
  39. 1.1
  40. 93

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