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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 142 · 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 90 =
  2. 2.20% of 900 =
  3. 3.50% of 900 =
  4. 4.20% of 460 =
  5. 5.15% of 480 =
  6. 6.20% of 220 =
  7. 7.50% of 420 =
  8. 8.5% of 170 =
  9. 9.25% of 730 =
  10. 10.20% of 790 =
  11. 11.25% of 110 =
  12. 12.20% of 500 =
  13. 13.10% of 430 =
  14. 14.20% of 200 =
  15. 15.25% of 480 =
  16. 16.50% of 300 =
  17. 17.20% of 740 =
  18. 18.10% of 240 =
  19. 19.10% of 600 =
  20. 20.25% of 870 =
  21. 21.1% of 540 =
  22. 22.20% of 300 =
  23. 23.20% of 60 =
  24. 24.25% of 460 =
  25. 25.10% of 120 =
  26. 26.50% of 900 =
  27. 27.10% of 40 =
  28. 28.15% of 350 =
  29. 29.1% of 430 =
  30. 30.5% of 80 =
  31. 31.25% of 550 =
  32. 32.1% of 500 =
  33. 33.10% of 380 =
  34. 34.50% of 670 =
  35. 35.5% of 450 =
  36. 36.15% of 170 =
  37. 37.50% of 330 =
  38. 38.5% of 690 =
  39. 39.5% of 610 =
  40. 40.10% of 770 =

Answer key

  1. 45
  2. 180
  3. 450
  4. 92
  5. 72
  6. 44
  7. 210
  8. 8.5
  9. 182.5
  10. 158
  11. 27.5
  12. 100
  13. 43
  14. 40
  15. 120
  16. 150
  17. 148
  18. 24
  19. 60
  20. 217.5
  21. 5.4
  22. 60
  23. 12
  24. 115
  25. 12
  26. 450
  27. 4
  28. 52.5
  29. 4.3
  30. 4
  31. 137.5
  32. 5
  33. 38
  34. 335
  35. 22.5
  36. 25.5
  37. 165
  38. 34.5
  39. 30.5
  40. 77

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