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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 19 · 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 90 =
  2. 2.10% of 190 =
  3. 3.50% of 830 =
  4. 4.15% of 20 =
  5. 5.15% of 220 =
  6. 6.1% of 250 =
  7. 7.10% of 190 =
  8. 8.15% of 350 =
  9. 9.15% of 330 =
  10. 10.20% of 400 =
  11. 11.1% of 40 =
  12. 12.1% of 880 =
  13. 13.20% of 630 =
  14. 14.5% of 640 =
  15. 15.5% of 440 =
  16. 16.50% of 690 =
  17. 17.5% of 820 =
  18. 18.20% of 650 =
  19. 19.50% of 620 =
  20. 20.10% of 770 =
  21. 21.10% of 120 =
  22. 22.50% of 310 =
  23. 23.25% of 740 =
  24. 24.20% of 500 =
  25. 25.15% of 290 =
  26. 26.10% of 40 =
  27. 27.25% of 170 =
  28. 28.5% of 590 =
  29. 29.25% of 130 =
  30. 30.15% of 900 =
  31. 31.1% of 410 =
  32. 32.15% of 410 =
  33. 33.5% of 100 =
  34. 34.50% of 440 =
  35. 35.25% of 360 =
  36. 36.5% of 110 =
  37. 37.25% of 240 =
  38. 38.5% of 210 =
  39. 39.10% of 570 =
  40. 40.1% of 130 =

Answer key

  1. 4.5
  2. 19
  3. 415
  4. 3
  5. 33
  6. 2.5
  7. 19
  8. 52.5
  9. 49.5
  10. 80
  11. 0.4
  12. 8.8
  13. 126
  14. 32
  15. 22
  16. 345
  17. 41
  18. 130
  19. 310
  20. 77
  21. 12
  22. 155
  23. 185
  24. 100
  25. 43.5
  26. 4
  27. 42.5
  28. 29.5
  29. 32.5
  30. 135
  31. 4.1
  32. 61.5
  33. 5
  34. 220
  35. 90
  36. 5.5
  37. 60
  38. 10.5
  39. 57
  40. 1.3

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