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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 681 · 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 450 =
  2. 2.1% of 330 =
  3. 3.50% of 700 =
  4. 4.5% of 640 =
  5. 5.5% of 520 =
  6. 6.5% of 40 =
  7. 7.5% of 40 =
  8. 8.25% of 40 =
  9. 9.25% of 180 =
  10. 10.10% of 700 =
  11. 11.10% of 750 =
  12. 12.1% of 860 =
  13. 13.1% of 550 =
  14. 14.50% of 80 =
  15. 15.50% of 270 =
  16. 16.5% of 850 =
  17. 17.20% of 260 =
  18. 18.10% of 410 =
  19. 19.15% of 60 =
  20. 20.5% of 740 =
  21. 21.1% of 310 =
  22. 22.50% of 770 =
  23. 23.5% of 380 =
  24. 24.50% of 40 =
  25. 25.10% of 540 =
  26. 26.10% of 430 =
  27. 27.50% of 790 =
  28. 28.15% of 180 =
  29. 29.1% of 690 =
  30. 30.10% of 400 =
  31. 31.15% of 290 =
  32. 32.20% of 190 =
  33. 33.50% of 210 =
  34. 34.10% of 750 =
  35. 35.5% of 180 =
  36. 36.5% of 230 =
  37. 37.20% of 50 =
  38. 38.10% of 140 =
  39. 39.50% of 860 =
  40. 40.25% of 550 =

Answer key

  1. 22.5
  2. 3.3
  3. 350
  4. 32
  5. 26
  6. 2
  7. 2
  8. 10
  9. 45
  10. 70
  11. 75
  12. 8.6
  13. 5.5
  14. 40
  15. 135
  16. 42.5
  17. 52
  18. 41
  19. 9
  20. 37
  21. 3.1
  22. 385
  23. 19
  24. 20
  25. 54
  26. 43
  27. 395
  28. 27
  29. 6.9
  30. 40
  31. 43.5
  32. 38
  33. 105
  34. 75
  35. 9
  36. 11.5
  37. 10
  38. 14
  39. 430
  40. 137.5

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