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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 370 · 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. 1.10% of 670 =
  2. 2.5% of 780 =
  3. 3.5% of 670 =
  4. 4.5% of 480 =
  5. 5.20% of 360 =
  6. 6.15% of 610 =
  7. 7.5% of 400 =
  8. 8.20% of 870 =
  9. 9.50% of 610 =
  10. 10.1% of 490 =
  11. 11.50% of 700 =
  12. 12.25% of 630 =
  13. 13.25% of 170 =
  14. 14.10% of 750 =
  15. 15.5% of 650 =
  16. 16.10% of 530 =
  17. 17.50% of 70 =
  18. 18.25% of 530 =
  19. 19.20% of 640 =
  20. 20.25% of 900 =
  21. 21.20% of 790 =
  22. 22.20% of 240 =
  23. 23.25% of 390 =
  24. 24.25% of 570 =
  25. 25.15% of 420 =
  26. 26.20% of 20 =
  27. 27.10% of 770 =
  28. 28.50% of 50 =
  29. 29.25% of 600 =
  30. 30.50% of 340 =
  31. 31.5% of 230 =
  32. 32.20% of 350 =
  33. 33.10% of 800 =
  34. 34.5% of 60 =
  35. 35.10% of 200 =
  36. 36.15% of 140 =
  37. 37.5% of 800 =
  38. 38.1% of 210 =
  39. 39.25% of 520 =
  40. 40.10% of 870 =

Answer key

  1. 67
  2. 39
  3. 33.5
  4. 24
  5. 72
  6. 91.5
  7. 20
  8. 174
  9. 305
  10. 4.9
  11. 350
  12. 157.5
  13. 42.5
  14. 75
  15. 32.5
  16. 53
  17. 35
  18. 132.5
  19. 128
  20. 225
  21. 158
  22. 48
  23. 97.5
  24. 142.5
  25. 63
  26. 4
  27. 77
  28. 25
  29. 150
  30. 170
  31. 11.5
  32. 70
  33. 80
  34. 3
  35. 20
  36. 21
  37. 40
  38. 2.1
  39. 130
  40. 87

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