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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 902 · 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. 1.20% of 790 =
  2. 2.20% of 590 =
  3. 3.25% of 290 =
  4. 4.15% of 770 =
  5. 5.10% of 110 =
  6. 6.15% of 400 =
  7. 7.15% of 220 =
  8. 8.20% of 510 =
  9. 9.1% of 120 =
  10. 10.25% of 160 =
  11. 11.25% of 60 =
  12. 12.15% of 330 =
  13. 13.10% of 730 =
  14. 14.50% of 310 =
  15. 15.15% of 70 =
  16. 16.5% of 100 =
  17. 17.20% of 110 =
  18. 18.15% of 140 =
  19. 19.15% of 730 =
  20. 20.50% of 610 =
  21. 21.1% of 350 =
  22. 22.15% of 390 =
  23. 23.5% of 530 =
  24. 24.50% of 840 =
  25. 25.20% of 830 =
  26. 26.5% of 430 =
  27. 27.1% of 370 =
  28. 28.1% of 20 =
  29. 29.15% of 140 =
  30. 30.10% of 100 =
  31. 31.50% of 80 =
  32. 32.15% of 470 =
  33. 33.20% of 170 =
  34. 34.25% of 260 =
  35. 35.10% of 50 =
  36. 36.50% of 390 =
  37. 37.5% of 200 =
  38. 38.5% of 530 =
  39. 39.5% of 370 =
  40. 40.25% of 560 =

Answer key

  1. 158
  2. 118
  3. 72.5
  4. 115.5
  5. 11
  6. 60
  7. 33
  8. 102
  9. 1.2
  10. 40
  11. 15
  12. 49.5
  13. 73
  14. 155
  15. 10.5
  16. 5
  17. 22
  18. 21
  19. 109.5
  20. 305
  21. 3.5
  22. 58.5
  23. 26.5
  24. 420
  25. 166
  26. 21.5
  27. 3.7
  28. 0.2
  29. 21
  30. 10
  31. 40
  32. 70.5
  33. 34
  34. 65
  35. 5
  36. 195
  37. 10
  38. 26.5
  39. 18.5
  40. 140

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