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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 439 · 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. 1.25% of 550 =
  2. 2.50% of 440 =
  3. 3.15% of 820 =
  4. 4.10% of 50 =
  5. 5.10% of 50 =
  6. 6.1% of 540 =
  7. 7.25% of 730 =
  8. 8.15% of 870 =
  9. 9.5% of 370 =
  10. 10.5% of 710 =
  11. 11.5% of 70 =
  12. 12.50% of 210 =
  13. 13.20% of 900 =
  14. 14.1% of 840 =
  15. 15.50% of 650 =
  16. 16.20% of 210 =
  17. 17.20% of 720 =
  18. 18.50% of 500 =
  19. 19.25% of 720 =
  20. 20.50% of 20 =
  21. 21.1% of 150 =
  22. 22.25% of 760 =
  23. 23.5% of 390 =
  24. 24.10% of 50 =
  25. 25.5% of 820 =
  26. 26.5% of 150 =
  27. 27.15% of 130 =
  28. 28.10% of 780 =
  29. 29.20% of 70 =
  30. 30.5% of 310 =
  31. 31.50% of 540 =
  32. 32.15% of 870 =
  33. 33.15% of 660 =
  34. 34.20% of 830 =
  35. 35.50% of 360 =
  36. 36.10% of 290 =
  37. 37.20% of 220 =
  38. 38.50% of 800 =
  39. 39.1% of 620 =
  40. 40.1% of 630 =

Answer key

  1. 137.5
  2. 220
  3. 123
  4. 5
  5. 5
  6. 5.4
  7. 182.5
  8. 130.5
  9. 18.5
  10. 35.5
  11. 3.5
  12. 105
  13. 180
  14. 8.4
  15. 325
  16. 42
  17. 144
  18. 250
  19. 180
  20. 10
  21. 1.5
  22. 190
  23. 19.5
  24. 5
  25. 41
  26. 7.5
  27. 19.5
  28. 78
  29. 14
  30. 15.5
  31. 270
  32. 130.5
  33. 99
  34. 166
  35. 180
  36. 29
  37. 44
  38. 400
  39. 6.2
  40. 6.3

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