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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 990 · 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. 1.10% of 300 =
  2. 2.50% of 760 =
  3. 3.20% of 900 =
  4. 4.20% of 240 =
  5. 5.20% of 670 =
  6. 6.10% of 760 =
  7. 7.15% of 660 =
  8. 8.15% of 260 =
  9. 9.5% of 350 =
  10. 10.50% of 390 =
  11. 11.25% of 450 =
  12. 12.1% of 540 =
  13. 13.5% of 650 =
  14. 14.5% of 60 =
  15. 15.10% of 660 =
  16. 16.50% of 330 =
  17. 17.15% of 370 =
  18. 18.15% of 570 =
  19. 19.1% of 860 =
  20. 20.10% of 810 =
  21. 21.5% of 560 =
  22. 22.25% of 100 =
  23. 23.20% of 620 =
  24. 24.1% of 690 =
  25. 25.25% of 30 =
  26. 26.1% of 160 =
  27. 27.20% of 260 =
  28. 28.1% of 290 =
  29. 29.25% of 670 =
  30. 30.20% of 150 =
  31. 31.10% of 120 =
  32. 32.20% of 40 =
  33. 33.10% of 180 =
  34. 34.50% of 860 =
  35. 35.10% of 630 =
  36. 36.15% of 210 =
  37. 37.1% of 150 =
  38. 38.5% of 150 =
  39. 39.1% of 630 =
  40. 40.50% of 250 =

Answer key

  1. 30
  2. 380
  3. 180
  4. 48
  5. 134
  6. 76
  7. 99
  8. 39
  9. 17.5
  10. 195
  11. 112.5
  12. 5.4
  13. 32.5
  14. 3
  15. 66
  16. 165
  17. 55.5
  18. 85.5
  19. 8.6
  20. 81
  21. 28
  22. 25
  23. 124
  24. 6.9
  25. 7.5
  26. 1.6
  27. 52
  28. 2.9
  29. 167.5
  30. 30
  31. 12
  32. 8
  33. 18
  34. 430
  35. 63
  36. 31.5
  37. 1.5
  38. 7.5
  39. 6.3
  40. 125

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