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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 11 · 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 470 =
  2. 2.20% of 650 =
  3. 3.25% of 430 =
  4. 4.20% of 160 =
  5. 5.20% of 390 =
  6. 6.50% of 840 =
  7. 7.5% of 450 =
  8. 8.15% of 520 =
  9. 9.15% of 30 =
  10. 10.50% of 600 =
  11. 11.5% of 820 =
  12. 12.10% of 630 =
  13. 13.20% of 350 =
  14. 14.10% of 740 =
  15. 15.1% of 720 =
  16. 16.1% of 260 =
  17. 17.5% of 810 =
  18. 18.10% of 290 =
  19. 19.20% of 840 =
  20. 20.1% of 430 =
  21. 21.1% of 420 =
  22. 22.25% of 70 =
  23. 23.5% of 540 =
  24. 24.20% of 200 =
  25. 25.25% of 510 =
  26. 26.20% of 410 =
  27. 27.10% of 210 =
  28. 28.15% of 60 =
  29. 29.50% of 590 =
  30. 30.10% of 240 =
  31. 31.10% of 860 =
  32. 32.20% of 540 =
  33. 33.1% of 750 =
  34. 34.25% of 530 =
  35. 35.10% of 470 =
  36. 36.5% of 890 =
  37. 37.1% of 280 =
  38. 38.10% of 310 =
  39. 39.25% of 540 =
  40. 40.15% of 710 =

Answer key

  1. 23.5
  2. 130
  3. 107.5
  4. 32
  5. 78
  6. 420
  7. 22.5
  8. 78
  9. 4.5
  10. 300
  11. 41
  12. 63
  13. 70
  14. 74
  15. 7.2
  16. 2.6
  17. 40.5
  18. 29
  19. 168
  20. 4.3
  21. 4.2
  22. 17.5
  23. 27
  24. 40
  25. 127.5
  26. 82
  27. 21
  28. 9
  29. 295
  30. 24
  31. 86
  32. 108
  33. 7.5
  34. 132.5
  35. 47
  36. 44.5
  37. 2.8
  38. 31
  39. 135
  40. 106.5

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