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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 228 · 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. 1.15% of 160 =
  2. 2.10% of 130 =
  3. 3.25% of 820 =
  4. 4.5% of 820 =
  5. 5.10% of 850 =
  6. 6.15% of 250 =
  7. 7.10% of 720 =
  8. 8.15% of 580 =
  9. 9.5% of 310 =
  10. 10.10% of 500 =
  11. 11.5% of 660 =
  12. 12.1% of 730 =
  13. 13.20% of 550 =
  14. 14.50% of 770 =
  15. 15.10% of 710 =
  16. 16.50% of 480 =
  17. 17.5% of 700 =
  18. 18.15% of 200 =
  19. 19.50% of 580 =
  20. 20.25% of 160 =
  21. 21.5% of 160 =
  22. 22.10% of 870 =
  23. 23.10% of 570 =
  24. 24.10% of 880 =
  25. 25.15% of 650 =
  26. 26.50% of 630 =
  27. 27.25% of 770 =
  28. 28.10% of 390 =
  29. 29.10% of 340 =
  30. 30.1% of 600 =
  31. 31.10% of 70 =
  32. 32.15% of 230 =
  33. 33.20% of 330 =
  34. 34.25% of 570 =
  35. 35.15% of 740 =
  36. 36.1% of 250 =
  37. 37.50% of 480 =
  38. 38.15% of 100 =
  39. 39.5% of 210 =
  40. 40.20% of 120 =

Answer key

  1. 24
  2. 13
  3. 205
  4. 41
  5. 85
  6. 37.5
  7. 72
  8. 87
  9. 15.5
  10. 50
  11. 33
  12. 7.3
  13. 110
  14. 385
  15. 71
  16. 240
  17. 35
  18. 30
  19. 290
  20. 40
  21. 8
  22. 87
  23. 57
  24. 88
  25. 97.5
  26. 315
  27. 192.5
  28. 39
  29. 34
  30. 6
  31. 7
  32. 34.5
  33. 66
  34. 142.5
  35. 111
  36. 2.5
  37. 240
  38. 15
  39. 10.5
  40. 24

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