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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 899 · 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. 1.25% of 210 =
  2. 2.15% of 690 =
  3. 3.20% of 850 =
  4. 4.15% of 130 =
  5. 5.15% of 490 =
  6. 6.20% of 170 =
  7. 7.20% of 90 =
  8. 8.15% of 720 =
  9. 9.10% of 90 =
  10. 10.10% of 420 =
  11. 11.50% of 110 =
  12. 12.5% of 590 =
  13. 13.5% of 230 =
  14. 14.5% of 290 =
  15. 15.50% of 320 =
  16. 16.1% of 240 =
  17. 17.20% of 620 =
  18. 18.10% of 140 =
  19. 19.25% of 670 =
  20. 20.25% of 580 =
  21. 21.50% of 430 =
  22. 22.50% of 370 =
  23. 23.15% of 660 =
  24. 24.5% of 610 =
  25. 25.20% of 20 =
  26. 26.20% of 620 =
  27. 27.25% of 240 =
  28. 28.50% of 630 =
  29. 29.50% of 520 =
  30. 30.1% of 380 =
  31. 31.50% of 600 =
  32. 32.5% of 140 =
  33. 33.10% of 100 =
  34. 34.20% of 620 =
  35. 35.25% of 550 =
  36. 36.1% of 490 =
  37. 37.1% of 60 =
  38. 38.50% of 210 =
  39. 39.5% of 300 =
  40. 40.5% of 40 =

Answer key

  1. 52.5
  2. 103.5
  3. 170
  4. 19.5
  5. 73.5
  6. 34
  7. 18
  8. 108
  9. 9
  10. 42
  11. 55
  12. 29.5
  13. 11.5
  14. 14.5
  15. 160
  16. 2.4
  17. 124
  18. 14
  19. 167.5
  20. 145
  21. 215
  22. 185
  23. 99
  24. 30.5
  25. 4
  26. 124
  27. 60
  28. 315
  29. 260
  30. 3.8
  31. 300
  32. 7
  33. 10
  34. 124
  35. 137.5
  36. 4.9
  37. 0.6
  38. 105
  39. 15
  40. 2

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