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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 4 · 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 80 =
  2. 2.50% of 760 =
  3. 3.10% of 120 =
  4. 4.5% of 430 =
  5. 5.15% of 720 =
  6. 6.10% of 370 =
  7. 7.10% of 30 =
  8. 8.1% of 190 =
  9. 9.25% of 30 =
  10. 10.5% of 250 =
  11. 11.15% of 310 =
  12. 12.15% of 420 =
  13. 13.1% of 130 =
  14. 14.20% of 230 =
  15. 15.1% of 860 =
  16. 16.5% of 120 =
  17. 17.10% of 240 =
  18. 18.20% of 260 =
  19. 19.15% of 400 =
  20. 20.20% of 560 =
  21. 21.10% of 870 =
  22. 22.10% of 390 =
  23. 23.10% of 370 =
  24. 24.1% of 20 =
  25. 25.10% of 900 =
  26. 26.50% of 80 =
  27. 27.20% of 430 =
  28. 28.10% of 280 =
  29. 29.1% of 730 =
  30. 30.20% of 430 =
  31. 31.10% of 30 =
  32. 32.50% of 110 =
  33. 33.15% of 490 =
  34. 34.10% of 720 =
  35. 35.5% of 190 =
  36. 36.15% of 830 =
  37. 37.10% of 160 =
  38. 38.10% of 570 =
  39. 39.25% of 320 =
  40. 40.5% of 570 =

Answer key

  1. 20
  2. 380
  3. 12
  4. 21.5
  5. 108
  6. 37
  7. 3
  8. 1.9
  9. 7.5
  10. 12.5
  11. 46.5
  12. 63
  13. 1.3
  14. 46
  15. 8.6
  16. 6
  17. 24
  18. 52
  19. 60
  20. 112
  21. 87
  22. 39
  23. 37
  24. 0.2
  25. 90
  26. 40
  27. 86
  28. 28
  29. 7.3
  30. 86
  31. 3
  32. 55
  33. 73.5
  34. 72
  35. 9.5
  36. 124.5
  37. 16
  38. 57
  39. 80
  40. 28.5

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