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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 842 · 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. 1.1% of 880 =
  2. 2.5% of 450 =
  3. 3.15% of 760 =
  4. 4.20% of 240 =
  5. 5.10% of 730 =
  6. 6.50% of 210 =
  7. 7.5% of 680 =
  8. 8.20% of 180 =
  9. 9.10% of 660 =
  10. 10.15% of 290 =
  11. 11.25% of 900 =
  12. 12.5% of 70 =
  13. 13.50% of 250 =
  14. 14.50% of 850 =
  15. 15.20% of 40 =
  16. 16.15% of 190 =
  17. 17.10% of 160 =
  18. 18.25% of 830 =
  19. 19.5% of 510 =
  20. 20.1% of 290 =
  21. 21.5% of 740 =
  22. 22.25% of 570 =
  23. 23.20% of 750 =
  24. 24.1% of 550 =
  25. 25.5% of 840 =
  26. 26.50% of 670 =
  27. 27.20% of 310 =
  28. 28.50% of 770 =
  29. 29.25% of 740 =
  30. 30.1% of 260 =
  31. 31.10% of 430 =
  32. 32.1% of 460 =
  33. 33.15% of 340 =
  34. 34.10% of 860 =
  35. 35.1% of 240 =
  36. 36.10% of 260 =
  37. 37.25% of 280 =
  38. 38.10% of 500 =
  39. 39.50% of 470 =
  40. 40.20% of 840 =

Answer key

  1. 8.8
  2. 22.5
  3. 114
  4. 48
  5. 73
  6. 105
  7. 34
  8. 36
  9. 66
  10. 43.5
  11. 225
  12. 3.5
  13. 125
  14. 425
  15. 8
  16. 28.5
  17. 16
  18. 207.5
  19. 25.5
  20. 2.9
  21. 37
  22. 142.5
  23. 150
  24. 5.5
  25. 42
  26. 335
  27. 62
  28. 385
  29. 185
  30. 2.6
  31. 43
  32. 4.6
  33. 51
  34. 86
  35. 2.4
  36. 26
  37. 70
  38. 50
  39. 235
  40. 168

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