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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 835 · 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 230 =
  2. 2.50% of 740 =
  3. 3.15% of 260 =
  4. 4.50% of 700 =
  5. 5.50% of 320 =
  6. 6.15% of 280 =
  7. 7.5% of 870 =
  8. 8.10% of 310 =
  9. 9.5% of 290 =
  10. 10.1% of 110 =
  11. 11.25% of 220 =
  12. 12.1% of 270 =
  13. 13.10% of 610 =
  14. 14.15% of 820 =
  15. 15.50% of 820 =
  16. 16.50% of 830 =
  17. 17.50% of 540 =
  18. 18.50% of 570 =
  19. 19.5% of 60 =
  20. 20.1% of 560 =
  21. 21.50% of 30 =
  22. 22.15% of 640 =
  23. 23.20% of 130 =
  24. 24.50% of 160 =
  25. 25.20% of 270 =
  26. 26.1% of 620 =
  27. 27.50% of 290 =
  28. 28.15% of 20 =
  29. 29.10% of 620 =
  30. 30.20% of 380 =
  31. 31.25% of 840 =
  32. 32.10% of 790 =
  33. 33.1% of 400 =
  34. 34.25% of 780 =
  35. 35.20% of 810 =
  36. 36.15% of 690 =
  37. 37.20% of 120 =
  38. 38.5% of 730 =
  39. 39.10% of 650 =
  40. 40.1% of 380 =

Answer key

  1. 115
  2. 370
  3. 39
  4. 350
  5. 160
  6. 42
  7. 43.5
  8. 31
  9. 14.5
  10. 1.1
  11. 55
  12. 2.7
  13. 61
  14. 123
  15. 410
  16. 415
  17. 270
  18. 285
  19. 3
  20. 5.6
  21. 15
  22. 96
  23. 26
  24. 80
  25. 54
  26. 6.2
  27. 145
  28. 3
  29. 62
  30. 76
  31. 210
  32. 79
  33. 4
  34. 195
  35. 162
  36. 103.5
  37. 24
  38. 36.5
  39. 65
  40. 3.8

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