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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 80 · 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. 1.1% of 430 =
  2. 2.1% of 560 =
  3. 3.1% of 200 =
  4. 4.5% of 210 =
  5. 5.20% of 290 =
  6. 6.10% of 590 =
  7. 7.50% of 440 =
  8. 8.15% of 150 =
  9. 9.10% of 720 =
  10. 10.5% of 20 =
  11. 11.5% of 470 =
  12. 12.15% of 150 =
  13. 13.10% of 190 =
  14. 14.1% of 670 =
  15. 15.1% of 700 =
  16. 16.50% of 170 =
  17. 17.15% of 540 =
  18. 18.50% of 410 =
  19. 19.10% of 400 =
  20. 20.10% of 510 =
  21. 21.20% of 500 =
  22. 22.15% of 160 =
  23. 23.10% of 900 =
  24. 24.15% of 40 =
  25. 25.10% of 130 =
  26. 26.10% of 400 =
  27. 27.10% of 500 =
  28. 28.25% of 630 =
  29. 29.5% of 140 =
  30. 30.20% of 730 =
  31. 31.1% of 270 =
  32. 32.1% of 740 =
  33. 33.5% of 410 =
  34. 34.15% of 170 =
  35. 35.15% of 520 =
  36. 36.5% of 80 =
  37. 37.10% of 790 =
  38. 38.50% of 260 =
  39. 39.5% of 200 =
  40. 40.20% of 490 =

Answer key

  1. 4.3
  2. 5.6
  3. 2
  4. 10.5
  5. 58
  6. 59
  7. 220
  8. 22.5
  9. 72
  10. 1
  11. 23.5
  12. 22.5
  13. 19
  14. 6.7
  15. 7
  16. 85
  17. 81
  18. 205
  19. 40
  20. 51
  21. 100
  22. 24
  23. 90
  24. 6
  25. 13
  26. 40
  27. 50
  28. 157.5
  29. 7
  30. 146
  31. 2.7
  32. 7.4
  33. 20.5
  34. 25.5
  35. 78
  36. 4
  37. 79
  38. 130
  39. 10
  40. 98

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