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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 528 · 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. 1.1% of 820 =
  2. 2.10% of 670 =
  3. 3.15% of 690 =
  4. 4.5% of 580 =
  5. 5.10% of 370 =
  6. 6.1% of 130 =
  7. 7.10% of 280 =
  8. 8.10% of 270 =
  9. 9.10% of 490 =
  10. 10.10% of 620 =
  11. 11.5% of 480 =
  12. 12.10% of 560 =
  13. 13.50% of 800 =
  14. 14.10% of 730 =
  15. 15.5% of 630 =
  16. 16.15% of 830 =
  17. 17.50% of 110 =
  18. 18.50% of 30 =
  19. 19.5% of 510 =
  20. 20.5% of 530 =
  21. 21.25% of 580 =
  22. 22.10% of 610 =
  23. 23.5% of 810 =
  24. 24.20% of 90 =
  25. 25.1% of 250 =
  26. 26.20% of 660 =
  27. 27.10% of 220 =
  28. 28.50% of 540 =
  29. 29.5% of 690 =
  30. 30.5% of 620 =
  31. 31.5% of 480 =
  32. 32.10% of 130 =
  33. 33.25% of 480 =
  34. 34.25% of 890 =
  35. 35.10% of 350 =
  36. 36.50% of 190 =
  37. 37.15% of 820 =
  38. 38.50% of 220 =
  39. 39.25% of 720 =
  40. 40.20% of 60 =

Answer key

  1. 8.2
  2. 67
  3. 103.5
  4. 29
  5. 37
  6. 1.3
  7. 28
  8. 27
  9. 49
  10. 62
  11. 24
  12. 56
  13. 400
  14. 73
  15. 31.5
  16. 124.5
  17. 55
  18. 15
  19. 25.5
  20. 26.5
  21. 145
  22. 61
  23. 40.5
  24. 18
  25. 2.5
  26. 132
  27. 22
  28. 270
  29. 34.5
  30. 31
  31. 24
  32. 13
  33. 120
  34. 222.5
  35. 35
  36. 95
  37. 123
  38. 110
  39. 180
  40. 12

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