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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 250 · 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 180 =
  2. 2.15% of 30 =
  3. 3.15% of 770 =
  4. 4.20% of 740 =
  5. 5.15% of 290 =
  6. 6.15% of 500 =
  7. 7.20% of 400 =
  8. 8.10% of 410 =
  9. 9.20% of 370 =
  10. 10.20% of 380 =
  11. 11.20% of 210 =
  12. 12.20% of 580 =
  13. 13.5% of 870 =
  14. 14.1% of 750 =
  15. 15.15% of 600 =
  16. 16.15% of 900 =
  17. 17.10% of 440 =
  18. 18.5% of 540 =
  19. 19.20% of 870 =
  20. 20.20% of 560 =
  21. 21.5% of 670 =
  22. 22.15% of 580 =
  23. 23.20% of 350 =
  24. 24.25% of 190 =
  25. 25.5% of 880 =
  26. 26.10% of 850 =
  27. 27.20% of 20 =
  28. 28.10% of 290 =
  29. 29.20% of 240 =
  30. 30.1% of 270 =
  31. 31.1% of 570 =
  32. 32.5% of 510 =
  33. 33.5% of 300 =
  34. 34.1% of 490 =
  35. 35.20% of 120 =
  36. 36.20% of 820 =
  37. 37.20% of 740 =
  38. 38.15% of 50 =
  39. 39.50% of 840 =
  40. 40.1% of 770 =

Answer key

  1. 9
  2. 4.5
  3. 115.5
  4. 148
  5. 43.5
  6. 75
  7. 80
  8. 41
  9. 74
  10. 76
  11. 42
  12. 116
  13. 43.5
  14. 7.5
  15. 90
  16. 135
  17. 44
  18. 27
  19. 174
  20. 112
  21. 33.5
  22. 87
  23. 70
  24. 47.5
  25. 44
  26. 85
  27. 4
  28. 29
  29. 48
  30. 2.7
  31. 5.7
  32. 25.5
  33. 15
  34. 4.9
  35. 24
  36. 164
  37. 148
  38. 7.5
  39. 420
  40. 7.7

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