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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 520 · 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 270 =
  2. 2.1% of 730 =
  3. 3.50% of 350 =
  4. 4.20% of 250 =
  5. 5.10% of 400 =
  6. 6.10% of 80 =
  7. 7.50% of 30 =
  8. 8.50% of 690 =
  9. 9.25% of 60 =
  10. 10.20% of 260 =
  11. 11.20% of 350 =
  12. 12.20% of 870 =
  13. 13.1% of 500 =
  14. 14.20% of 20 =
  15. 15.25% of 130 =
  16. 16.20% of 620 =
  17. 17.20% of 130 =
  18. 18.15% of 120 =
  19. 19.5% of 320 =
  20. 20.10% of 30 =
  21. 21.5% of 820 =
  22. 22.20% of 850 =
  23. 23.5% of 40 =
  24. 24.10% of 170 =
  25. 25.20% of 30 =
  26. 26.20% of 490 =
  27. 27.5% of 390 =
  28. 28.20% of 460 =
  29. 29.20% of 240 =
  30. 30.20% of 820 =
  31. 31.10% of 560 =
  32. 32.20% of 600 =
  33. 33.10% of 350 =
  34. 34.25% of 320 =
  35. 35.5% of 400 =
  36. 36.20% of 380 =
  37. 37.20% of 770 =
  38. 38.10% of 500 =
  39. 39.15% of 170 =
  40. 40.50% of 390 =

Answer key

  1. 40.5
  2. 7.3
  3. 175
  4. 50
  5. 40
  6. 8
  7. 15
  8. 345
  9. 15
  10. 52
  11. 70
  12. 174
  13. 5
  14. 4
  15. 32.5
  16. 124
  17. 26
  18. 18
  19. 16
  20. 3
  21. 41
  22. 170
  23. 2
  24. 17
  25. 6
  26. 98
  27. 19.5
  28. 92
  29. 48
  30. 164
  31. 56
  32. 120
  33. 35
  34. 80
  35. 20
  36. 76
  37. 154
  38. 50
  39. 25.5
  40. 195

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