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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 259 · 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. 1.15% of 760 =
  2. 2.5% of 430 =
  3. 3.25% of 480 =
  4. 4.5% of 350 =
  5. 5.10% of 170 =
  6. 6.25% of 100 =
  7. 7.5% of 480 =
  8. 8.10% of 230 =
  9. 9.10% of 140 =
  10. 10.20% of 670 =
  11. 11.10% of 570 =
  12. 12.10% of 870 =
  13. 13.5% of 510 =
  14. 14.10% of 250 =
  15. 15.50% of 620 =
  16. 16.1% of 800 =
  17. 17.1% of 440 =
  18. 18.10% of 90 =
  19. 19.10% of 900 =
  20. 20.10% of 70 =
  21. 21.50% of 270 =
  22. 22.15% of 230 =
  23. 23.20% of 640 =
  24. 24.1% of 570 =
  25. 25.15% of 680 =
  26. 26.1% of 430 =
  27. 27.15% of 610 =
  28. 28.10% of 800 =
  29. 29.50% of 240 =
  30. 30.10% of 600 =
  31. 31.10% of 370 =
  32. 32.10% of 280 =
  33. 33.50% of 250 =
  34. 34.5% of 560 =
  35. 35.20% of 390 =
  36. 36.1% of 540 =
  37. 37.1% of 580 =
  38. 38.5% of 110 =
  39. 39.5% of 620 =
  40. 40.25% of 70 =

Answer key

  1. 114
  2. 21.5
  3. 120
  4. 17.5
  5. 17
  6. 25
  7. 24
  8. 23
  9. 14
  10. 134
  11. 57
  12. 87
  13. 25.5
  14. 25
  15. 310
  16. 8
  17. 4.4
  18. 9
  19. 90
  20. 7
  21. 135
  22. 34.5
  23. 128
  24. 5.7
  25. 102
  26. 4.3
  27. 91.5
  28. 80
  29. 120
  30. 60
  31. 37
  32. 28
  33. 125
  34. 28
  35. 78
  36. 5.4
  37. 5.8
  38. 5.5
  39. 31
  40. 17.5

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