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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 277 · 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. 1.50% of 440 =
  2. 2.15% of 240 =
  3. 3.5% of 800 =
  4. 4.10% of 210 =
  5. 5.15% of 40 =
  6. 6.50% of 540 =
  7. 7.50% of 900 =
  8. 8.20% of 260 =
  9. 9.25% of 630 =
  10. 10.15% of 410 =
  11. 11.15% of 180 =
  12. 12.5% of 840 =
  13. 13.10% of 520 =
  14. 14.5% of 560 =
  15. 15.15% of 850 =
  16. 16.50% of 520 =
  17. 17.10% of 760 =
  18. 18.50% of 260 =
  19. 19.10% of 400 =
  20. 20.10% of 880 =
  21. 21.25% of 540 =
  22. 22.25% of 840 =
  23. 23.5% of 290 =
  24. 24.5% of 750 =
  25. 25.5% of 320 =
  26. 26.25% of 170 =
  27. 27.10% of 450 =
  28. 28.1% of 760 =
  29. 29.25% of 530 =
  30. 30.50% of 200 =
  31. 31.25% of 780 =
  32. 32.15% of 880 =
  33. 33.5% of 90 =
  34. 34.1% of 520 =
  35. 35.20% of 470 =
  36. 36.10% of 640 =
  37. 37.25% of 510 =
  38. 38.5% of 700 =
  39. 39.1% of 270 =
  40. 40.1% of 90 =

Answer key

  1. 220
  2. 36
  3. 40
  4. 21
  5. 6
  6. 270
  7. 450
  8. 52
  9. 157.5
  10. 61.5
  11. 27
  12. 42
  13. 52
  14. 28
  15. 127.5
  16. 260
  17. 76
  18. 130
  19. 40
  20. 88
  21. 135
  22. 210
  23. 14.5
  24. 37.5
  25. 16
  26. 42.5
  27. 45
  28. 7.6
  29. 132.5
  30. 100
  31. 195
  32. 132
  33. 4.5
  34. 5.2
  35. 94
  36. 64
  37. 127.5
  38. 35
  39. 2.7
  40. 0.9

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