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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 992 · 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. 1.15% of 690 =
  2. 2.25% of 820 =
  3. 3.5% of 310 =
  4. 4.10% of 700 =
  5. 5.25% of 650 =
  6. 6.5% of 170 =
  7. 7.50% of 200 =
  8. 8.25% of 30 =
  9. 9.50% of 530 =
  10. 10.20% of 370 =
  11. 11.15% of 490 =
  12. 12.50% of 120 =
  13. 13.5% of 230 =
  14. 14.5% of 380 =
  15. 15.5% of 630 =
  16. 16.10% of 570 =
  17. 17.25% of 670 =
  18. 18.5% of 500 =
  19. 19.25% of 740 =
  20. 20.1% of 690 =
  21. 21.20% of 850 =
  22. 22.15% of 650 =
  23. 23.50% of 340 =
  24. 24.50% of 230 =
  25. 25.50% of 250 =
  26. 26.1% of 860 =
  27. 27.25% of 560 =
  28. 28.10% of 860 =
  29. 29.1% of 350 =
  30. 30.1% of 70 =
  31. 31.15% of 380 =
  32. 32.5% of 170 =
  33. 33.1% of 390 =
  34. 34.50% of 430 =
  35. 35.10% of 690 =
  36. 36.50% of 130 =
  37. 37.10% of 600 =
  38. 38.25% of 490 =
  39. 39.50% of 810 =
  40. 40.5% of 270 =

Answer key

  1. 103.5
  2. 205
  3. 15.5
  4. 70
  5. 162.5
  6. 8.5
  7. 100
  8. 7.5
  9. 265
  10. 74
  11. 73.5
  12. 60
  13. 11.5
  14. 19
  15. 31.5
  16. 57
  17. 167.5
  18. 25
  19. 185
  20. 6.9
  21. 170
  22. 97.5
  23. 170
  24. 115
  25. 125
  26. 8.6
  27. 140
  28. 86
  29. 3.5
  30. 0.7
  31. 57
  32. 8.5
  33. 3.9
  34. 215
  35. 69
  36. 65
  37. 60
  38. 122.5
  39. 405
  40. 13.5

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