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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 969 · 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 860 =
  2. 2.5% of 410 =
  3. 3.25% of 810 =
  4. 4.50% of 740 =
  5. 5.5% of 150 =
  6. 6.1% of 800 =
  7. 7.10% of 650 =
  8. 8.10% of 730 =
  9. 9.5% of 610 =
  10. 10.5% of 240 =
  11. 11.5% of 170 =
  12. 12.5% of 210 =
  13. 13.10% of 100 =
  14. 14.1% of 760 =
  15. 15.5% of 720 =
  16. 16.50% of 560 =
  17. 17.20% of 330 =
  18. 18.1% of 860 =
  19. 19.50% of 580 =
  20. 20.5% of 420 =
  21. 21.10% of 450 =
  22. 22.15% of 130 =
  23. 23.20% of 810 =
  24. 24.10% of 290 =
  25. 25.20% of 680 =
  26. 26.5% of 540 =
  27. 27.50% of 740 =
  28. 28.10% of 630 =
  29. 29.50% of 120 =
  30. 30.15% of 650 =
  31. 31.25% of 610 =
  32. 32.10% of 450 =
  33. 33.5% of 260 =
  34. 34.10% of 300 =
  35. 35.50% of 450 =
  36. 36.20% of 790 =
  37. 37.1% of 390 =
  38. 38.15% of 180 =
  39. 39.25% of 270 =
  40. 40.50% of 420 =

Answer key

  1. 129
  2. 20.5
  3. 202.5
  4. 370
  5. 7.5
  6. 8
  7. 65
  8. 73
  9. 30.5
  10. 12
  11. 8.5
  12. 10.5
  13. 10
  14. 7.6
  15. 36
  16. 280
  17. 66
  18. 8.6
  19. 290
  20. 21
  21. 45
  22. 19.5
  23. 162
  24. 29
  25. 136
  26. 27
  27. 370
  28. 63
  29. 60
  30. 97.5
  31. 152.5
  32. 45
  33. 13
  34. 30
  35. 225
  36. 158
  37. 3.9
  38. 27
  39. 67.5
  40. 210

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