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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 525 · 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 670 =
  2. 2.15% of 240 =
  3. 3.20% of 390 =
  4. 4.5% of 890 =
  5. 5.15% of 420 =
  6. 6.1% of 380 =
  7. 7.20% of 710 =
  8. 8.5% of 900 =
  9. 9.20% of 200 =
  10. 10.1% of 610 =
  11. 11.20% of 270 =
  12. 12.20% of 550 =
  13. 13.5% of 430 =
  14. 14.20% of 20 =
  15. 15.20% of 740 =
  16. 16.10% of 320 =
  17. 17.1% of 600 =
  18. 18.10% of 280 =
  19. 19.50% of 330 =
  20. 20.5% of 230 =
  21. 21.5% of 650 =
  22. 22.1% of 110 =
  23. 23.25% of 890 =
  24. 24.1% of 570 =
  25. 25.50% of 690 =
  26. 26.1% of 360 =
  27. 27.5% of 820 =
  28. 28.20% of 710 =
  29. 29.25% of 170 =
  30. 30.10% of 510 =
  31. 31.1% of 160 =
  32. 32.5% of 750 =
  33. 33.20% of 880 =
  34. 34.10% of 40 =
  35. 35.10% of 460 =
  36. 36.15% of 630 =
  37. 37.5% of 700 =
  38. 38.5% of 760 =
  39. 39.10% of 80 =
  40. 40.1% of 790 =

Answer key

  1. 6.7
  2. 36
  3. 78
  4. 44.5
  5. 63
  6. 3.8
  7. 142
  8. 45
  9. 40
  10. 6.1
  11. 54
  12. 110
  13. 21.5
  14. 4
  15. 148
  16. 32
  17. 6
  18. 28
  19. 165
  20. 11.5
  21. 32.5
  22. 1.1
  23. 222.5
  24. 5.7
  25. 345
  26. 3.6
  27. 41
  28. 142
  29. 42.5
  30. 51
  31. 1.6
  32. 37.5
  33. 176
  34. 4
  35. 46
  36. 94.5
  37. 35
  38. 38
  39. 8
  40. 7.9

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