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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 891 · 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. 1.50% of 820 =
  2. 2.5% of 30 =
  3. 3.1% of 830 =
  4. 4.1% of 840 =
  5. 5.15% of 90 =
  6. 6.20% of 730 =
  7. 7.1% of 20 =
  8. 8.15% of 610 =
  9. 9.10% of 700 =
  10. 10.20% of 470 =
  11. 11.5% of 340 =
  12. 12.25% of 260 =
  13. 13.1% of 190 =
  14. 14.15% of 530 =
  15. 15.50% of 770 =
  16. 16.1% of 470 =
  17. 17.50% of 330 =
  18. 18.10% of 750 =
  19. 19.15% of 560 =
  20. 20.50% of 60 =
  21. 21.50% of 50 =
  22. 22.25% of 210 =
  23. 23.50% of 190 =
  24. 24.20% of 520 =
  25. 25.20% of 20 =
  26. 26.50% of 540 =
  27. 27.50% of 520 =
  28. 28.50% of 310 =
  29. 29.25% of 210 =
  30. 30.5% of 200 =
  31. 31.1% of 320 =
  32. 32.15% of 240 =
  33. 33.15% of 160 =
  34. 34.20% of 20 =
  35. 35.50% of 700 =
  36. 36.15% of 610 =
  37. 37.15% of 800 =
  38. 38.50% of 290 =
  39. 39.20% of 530 =
  40. 40.1% of 730 =

Answer key

  1. 410
  2. 1.5
  3. 8.3
  4. 8.4
  5. 13.5
  6. 146
  7. 0.2
  8. 91.5
  9. 70
  10. 94
  11. 17
  12. 65
  13. 1.9
  14. 79.5
  15. 385
  16. 4.7
  17. 165
  18. 75
  19. 84
  20. 30
  21. 25
  22. 52.5
  23. 95
  24. 104
  25. 4
  26. 270
  27. 260
  28. 155
  29. 52.5
  30. 10
  31. 3.2
  32. 36
  33. 24
  34. 4
  35. 350
  36. 91.5
  37. 120
  38. 145
  39. 106
  40. 7.3

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