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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 932 · 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 430 =
  2. 2.5% of 660 =
  3. 3.5% of 650 =
  4. 4.50% of 180 =
  5. 5.20% of 120 =
  6. 6.10% of 370 =
  7. 7.25% of 80 =
  8. 8.20% of 80 =
  9. 9.15% of 610 =
  10. 10.5% of 300 =
  11. 11.25% of 210 =
  12. 12.20% of 510 =
  13. 13.50% of 560 =
  14. 14.5% of 90 =
  15. 15.20% of 880 =
  16. 16.15% of 260 =
  17. 17.20% of 270 =
  18. 18.25% of 250 =
  19. 19.50% of 280 =
  20. 20.10% of 390 =
  21. 21.10% of 80 =
  22. 22.15% of 220 =
  23. 23.1% of 130 =
  24. 24.10% of 240 =
  25. 25.25% of 230 =
  26. 26.10% of 280 =
  27. 27.20% of 70 =
  28. 28.10% of 440 =
  29. 29.10% of 720 =
  30. 30.50% of 860 =
  31. 31.25% of 790 =
  32. 32.15% of 230 =
  33. 33.20% of 130 =
  34. 34.5% of 470 =
  35. 35.1% of 400 =
  36. 36.50% of 470 =
  37. 37.20% of 820 =
  38. 38.5% of 790 =
  39. 39.25% of 90 =
  40. 40.10% of 630 =

Answer key

  1. 86
  2. 33
  3. 32.5
  4. 90
  5. 24
  6. 37
  7. 20
  8. 16
  9. 91.5
  10. 15
  11. 52.5
  12. 102
  13. 280
  14. 4.5
  15. 176
  16. 39
  17. 54
  18. 62.5
  19. 140
  20. 39
  21. 8
  22. 33
  23. 1.3
  24. 24
  25. 57.5
  26. 28
  27. 14
  28. 44
  29. 72
  30. 430
  31. 197.5
  32. 34.5
  33. 26
  34. 23.5
  35. 4
  36. 235
  37. 164
  38. 39.5
  39. 22.5
  40. 63

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