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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 118 · 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 450 =
  2. 2.1% of 160 =
  3. 3.25% of 560 =
  4. 4.20% of 720 =
  5. 5.5% of 80 =
  6. 6.25% of 180 =
  7. 7.25% of 850 =
  8. 8.25% of 40 =
  9. 9.50% of 620 =
  10. 10.20% of 390 =
  11. 11.5% of 480 =
  12. 12.50% of 680 =
  13. 13.20% of 160 =
  14. 14.1% of 630 =
  15. 15.5% of 540 =
  16. 16.5% of 160 =
  17. 17.10% of 470 =
  18. 18.20% of 650 =
  19. 19.25% of 630 =
  20. 20.1% of 880 =
  21. 21.10% of 820 =
  22. 22.10% of 90 =
  23. 23.1% of 420 =
  24. 24.25% of 420 =
  25. 25.10% of 240 =
  26. 26.10% of 440 =
  27. 27.25% of 690 =
  28. 28.15% of 560 =
  29. 29.1% of 200 =
  30. 30.20% of 760 =
  31. 31.25% of 180 =
  32. 32.25% of 700 =
  33. 33.25% of 640 =
  34. 34.50% of 500 =
  35. 35.25% of 310 =
  36. 36.25% of 370 =
  37. 37.15% of 360 =
  38. 38.5% of 650 =
  39. 39.20% of 210 =
  40. 40.25% of 160 =

Answer key

  1. 67.5
  2. 1.6
  3. 140
  4. 144
  5. 4
  6. 45
  7. 212.5
  8. 10
  9. 310
  10. 78
  11. 24
  12. 340
  13. 32
  14. 6.3
  15. 27
  16. 8
  17. 47
  18. 130
  19. 157.5
  20. 8.8
  21. 82
  22. 9
  23. 4.2
  24. 105
  25. 24
  26. 44
  27. 172.5
  28. 84
  29. 2
  30. 152
  31. 45
  32. 175
  33. 160
  34. 250
  35. 77.5
  36. 92.5
  37. 54
  38. 32.5
  39. 42
  40. 40

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