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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 58 · 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. 1.5% of 210 =
  2. 2.15% of 500 =
  3. 3.5% of 190 =
  4. 4.5% of 440 =
  5. 5.1% of 830 =
  6. 6.10% of 380 =
  7. 7.25% of 760 =
  8. 8.15% of 240 =
  9. 9.15% of 630 =
  10. 10.5% of 750 =
  11. 11.20% of 200 =
  12. 12.10% of 20 =
  13. 13.25% of 830 =
  14. 14.5% of 310 =
  15. 15.5% of 60 =
  16. 16.5% of 180 =
  17. 17.5% of 390 =
  18. 18.25% of 750 =
  19. 19.50% of 680 =
  20. 20.1% of 110 =
  21. 21.1% of 310 =
  22. 22.10% of 480 =
  23. 23.5% of 290 =
  24. 24.10% of 510 =
  25. 25.1% of 640 =
  26. 26.15% of 330 =
  27. 27.25% of 80 =
  28. 28.50% of 170 =
  29. 29.5% of 420 =
  30. 30.10% of 20 =
  31. 31.5% of 470 =
  32. 32.10% of 120 =
  33. 33.50% of 810 =
  34. 34.20% of 780 =
  35. 35.1% of 380 =
  36. 36.25% of 380 =
  37. 37.20% of 640 =
  38. 38.5% of 150 =
  39. 39.15% of 100 =
  40. 40.5% of 620 =

Answer key

  1. 10.5
  2. 75
  3. 9.5
  4. 22
  5. 8.3
  6. 38
  7. 190
  8. 36
  9. 94.5
  10. 37.5
  11. 40
  12. 2
  13. 207.5
  14. 15.5
  15. 3
  16. 9
  17. 19.5
  18. 187.5
  19. 340
  20. 1.1
  21. 3.1
  22. 48
  23. 14.5
  24. 51
  25. 6.4
  26. 49.5
  27. 20
  28. 85
  29. 21
  30. 2
  31. 23.5
  32. 12
  33. 405
  34. 156
  35. 3.8
  36. 95
  37. 128
  38. 7.5
  39. 15
  40. 31

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