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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 963 · 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. 1.5% of 70 =
  2. 2.5% of 790 =
  3. 3.10% of 400 =
  4. 4.25% of 160 =
  5. 5.25% of 410 =
  6. 6.10% of 260 =
  7. 7.1% of 770 =
  8. 8.10% of 500 =
  9. 9.50% of 390 =
  10. 10.10% of 810 =
  11. 11.25% of 420 =
  12. 12.50% of 630 =
  13. 13.1% of 190 =
  14. 14.1% of 320 =
  15. 15.20% of 160 =
  16. 16.10% of 380 =
  17. 17.1% of 340 =
  18. 18.15% of 830 =
  19. 19.25% of 290 =
  20. 20.5% of 250 =
  21. 21.1% of 290 =
  22. 22.20% of 420 =
  23. 23.1% of 750 =
  24. 24.15% of 860 =
  25. 25.20% of 290 =
  26. 26.5% of 870 =
  27. 27.50% of 870 =
  28. 28.1% of 230 =
  29. 29.15% of 640 =
  30. 30.25% of 580 =
  31. 31.10% of 560 =
  32. 32.20% of 580 =
  33. 33.50% of 120 =
  34. 34.10% of 30 =
  35. 35.5% of 290 =
  36. 36.50% of 760 =
  37. 37.20% of 360 =
  38. 38.25% of 590 =
  39. 39.10% of 790 =
  40. 40.20% of 360 =

Answer key

  1. 3.5
  2. 39.5
  3. 40
  4. 40
  5. 102.5
  6. 26
  7. 7.7
  8. 50
  9. 195
  10. 81
  11. 105
  12. 315
  13. 1.9
  14. 3.2
  15. 32
  16. 38
  17. 3.4
  18. 124.5
  19. 72.5
  20. 12.5
  21. 2.9
  22. 84
  23. 7.5
  24. 129
  25. 58
  26. 43.5
  27. 435
  28. 2.3
  29. 96
  30. 145
  31. 56
  32. 116
  33. 60
  34. 3
  35. 14.5
  36. 380
  37. 72
  38. 147.5
  39. 79
  40. 72

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