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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 496 · 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 600 =
  2. 2.10% of 820 =
  3. 3.20% of 410 =
  4. 4.5% of 750 =
  5. 5.10% of 600 =
  6. 6.15% of 670 =
  7. 7.10% of 20 =
  8. 8.25% of 600 =
  9. 9.5% of 110 =
  10. 10.25% of 210 =
  11. 11.25% of 190 =
  12. 12.50% of 80 =
  13. 13.1% of 870 =
  14. 14.5% of 500 =
  15. 15.5% of 330 =
  16. 16.5% of 380 =
  17. 17.20% of 710 =
  18. 18.1% of 50 =
  19. 19.5% of 230 =
  20. 20.50% of 130 =
  21. 21.50% of 730 =
  22. 22.25% of 900 =
  23. 23.1% of 140 =
  24. 24.20% of 600 =
  25. 25.1% of 640 =
  26. 26.1% of 30 =
  27. 27.5% of 540 =
  28. 28.5% of 390 =
  29. 29.25% of 520 =
  30. 30.5% of 170 =
  31. 31.5% of 240 =
  32. 32.50% of 30 =
  33. 33.1% of 240 =
  34. 34.10% of 710 =
  35. 35.10% of 270 =
  36. 36.15% of 240 =
  37. 37.50% of 740 =
  38. 38.25% of 70 =
  39. 39.50% of 340 =
  40. 40.1% of 560 =

Answer key

  1. 300
  2. 82
  3. 82
  4. 37.5
  5. 60
  6. 100.5
  7. 2
  8. 150
  9. 5.5
  10. 52.5
  11. 47.5
  12. 40
  13. 8.7
  14. 25
  15. 16.5
  16. 19
  17. 142
  18. 0.5
  19. 11.5
  20. 65
  21. 365
  22. 225
  23. 1.4
  24. 120
  25. 6.4
  26. 0.3
  27. 27
  28. 19.5
  29. 130
  30. 8.5
  31. 12
  32. 15
  33. 2.4
  34. 71
  35. 27
  36. 36
  37. 370
  38. 17.5
  39. 170
  40. 5.6

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