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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 815 · 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. 1.20% of 570 =
  2. 2.15% of 70 =
  3. 3.25% of 610 =
  4. 4.1% of 420 =
  5. 5.15% of 600 =
  6. 6.5% of 30 =
  7. 7.20% of 490 =
  8. 8.20% of 390 =
  9. 9.50% of 450 =
  10. 10.25% of 500 =
  11. 11.20% of 660 =
  12. 12.5% of 580 =
  13. 13.5% of 880 =
  14. 14.1% of 690 =
  15. 15.50% of 770 =
  16. 16.1% of 620 =
  17. 17.25% of 730 =
  18. 18.20% of 670 =
  19. 19.5% of 430 =
  20. 20.15% of 610 =
  21. 21.5% of 590 =
  22. 22.1% of 240 =
  23. 23.15% of 810 =
  24. 24.15% of 670 =
  25. 25.5% of 700 =
  26. 26.1% of 340 =
  27. 27.10% of 30 =
  28. 28.15% of 110 =
  29. 29.20% of 430 =
  30. 30.20% of 550 =
  31. 31.5% of 800 =
  32. 32.1% of 610 =
  33. 33.1% of 800 =
  34. 34.25% of 250 =
  35. 35.10% of 410 =
  36. 36.15% of 710 =
  37. 37.5% of 540 =
  38. 38.15% of 610 =
  39. 39.15% of 680 =
  40. 40.10% of 890 =

Answer key

  1. 114
  2. 10.5
  3. 152.5
  4. 4.2
  5. 90
  6. 1.5
  7. 98
  8. 78
  9. 225
  10. 125
  11. 132
  12. 29
  13. 44
  14. 6.9
  15. 385
  16. 6.2
  17. 182.5
  18. 134
  19. 21.5
  20. 91.5
  21. 29.5
  22. 2.4
  23. 121.5
  24. 100.5
  25. 35
  26. 3.4
  27. 3
  28. 16.5
  29. 86
  30. 110
  31. 40
  32. 6.1
  33. 8
  34. 62.5
  35. 41
  36. 106.5
  37. 27
  38. 91.5
  39. 102
  40. 89

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