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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 833 · 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 330 =
  2. 2.50% of 640 =
  3. 3.15% of 270 =
  4. 4.25% of 40 =
  5. 5.10% of 590 =
  6. 6.50% of 110 =
  7. 7.5% of 40 =
  8. 8.15% of 810 =
  9. 9.50% of 880 =
  10. 10.10% of 830 =
  11. 11.10% of 20 =
  12. 12.10% of 260 =
  13. 13.20% of 870 =
  14. 14.5% of 640 =
  15. 15.10% of 710 =
  16. 16.10% of 70 =
  17. 17.1% of 220 =
  18. 18.5% of 680 =
  19. 19.10% of 370 =
  20. 20.1% of 620 =
  21. 21.50% of 450 =
  22. 22.50% of 260 =
  23. 23.15% of 90 =
  24. 24.10% of 540 =
  25. 25.1% of 820 =
  26. 26.20% of 80 =
  27. 27.15% of 320 =
  28. 28.10% of 290 =
  29. 29.25% of 110 =
  30. 30.25% of 130 =
  31. 31.50% of 730 =
  32. 32.5% of 280 =
  33. 33.10% of 460 =
  34. 34.20% of 280 =
  35. 35.50% of 630 =
  36. 36.50% of 310 =
  37. 37.10% of 120 =
  38. 38.50% of 230 =
  39. 39.1% of 240 =
  40. 40.5% of 80 =

Answer key

  1. 3.3
  2. 320
  3. 40.5
  4. 10
  5. 59
  6. 55
  7. 2
  8. 121.5
  9. 440
  10. 83
  11. 2
  12. 26
  13. 174
  14. 32
  15. 71
  16. 7
  17. 2.2
  18. 34
  19. 37
  20. 6.2
  21. 225
  22. 130
  23. 13.5
  24. 54
  25. 8.2
  26. 16
  27. 48
  28. 29
  29. 27.5
  30. 32.5
  31. 365
  32. 14
  33. 46
  34. 56
  35. 315
  36. 155
  37. 12
  38. 115
  39. 2.4
  40. 4

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