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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 727 · 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. 1.5% of 380 =
  2. 2.10% of 310 =
  3. 3.25% of 390 =
  4. 4.50% of 800 =
  5. 5.5% of 150 =
  6. 6.10% of 660 =
  7. 7.15% of 380 =
  8. 8.25% of 850 =
  9. 9.5% of 60 =
  10. 10.1% of 710 =
  11. 11.10% of 140 =
  12. 12.5% of 760 =
  13. 13.20% of 580 =
  14. 14.5% of 250 =
  15. 15.10% of 680 =
  16. 16.10% of 400 =
  17. 17.15% of 40 =
  18. 18.25% of 190 =
  19. 19.25% of 770 =
  20. 20.10% of 450 =
  21. 21.1% of 720 =
  22. 22.50% of 350 =
  23. 23.25% of 740 =
  24. 24.5% of 220 =
  25. 25.15% of 80 =
  26. 26.1% of 270 =
  27. 27.25% of 860 =
  28. 28.25% of 40 =
  29. 29.10% of 120 =
  30. 30.25% of 30 =
  31. 31.5% of 310 =
  32. 32.1% of 490 =
  33. 33.50% of 410 =
  34. 34.15% of 490 =
  35. 35.50% of 860 =
  36. 36.5% of 50 =
  37. 37.10% of 380 =
  38. 38.15% of 200 =
  39. 39.1% of 640 =
  40. 40.1% of 630 =

Answer key

  1. 19
  2. 31
  3. 97.5
  4. 400
  5. 7.5
  6. 66
  7. 57
  8. 212.5
  9. 3
  10. 7.1
  11. 14
  12. 38
  13. 116
  14. 12.5
  15. 68
  16. 40
  17. 6
  18. 47.5
  19. 192.5
  20. 45
  21. 7.2
  22. 175
  23. 185
  24. 11
  25. 12
  26. 2.7
  27. 215
  28. 10
  29. 12
  30. 7.5
  31. 15.5
  32. 4.9
  33. 205
  34. 73.5
  35. 430
  36. 2.5
  37. 38
  38. 30
  39. 6.4
  40. 6.3

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