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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 557 · 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. 1.10% of 800 =
  2. 2.5% of 280 =
  3. 3.15% of 530 =
  4. 4.5% of 90 =
  5. 5.20% of 900 =
  6. 6.25% of 310 =
  7. 7.25% of 550 =
  8. 8.20% of 320 =
  9. 9.20% of 700 =
  10. 10.20% of 60 =
  11. 11.10% of 240 =
  12. 12.1% of 260 =
  13. 13.20% of 690 =
  14. 14.25% of 850 =
  15. 15.25% of 770 =
  16. 16.10% of 170 =
  17. 17.20% of 300 =
  18. 18.1% of 460 =
  19. 19.10% of 630 =
  20. 20.10% of 490 =
  21. 21.20% of 130 =
  22. 22.10% of 790 =
  23. 23.10% of 660 =
  24. 24.20% of 880 =
  25. 25.1% of 360 =
  26. 26.15% of 720 =
  27. 27.5% of 630 =
  28. 28.20% of 710 =
  29. 29.25% of 660 =
  30. 30.15% of 110 =
  31. 31.5% of 480 =
  32. 32.15% of 260 =
  33. 33.15% of 800 =
  34. 34.5% of 840 =
  35. 35.15% of 460 =
  36. 36.25% of 600 =
  37. 37.5% of 150 =
  38. 38.25% of 550 =
  39. 39.25% of 220 =
  40. 40.10% of 450 =

Answer key

  1. 80
  2. 14
  3. 79.5
  4. 4.5
  5. 180
  6. 77.5
  7. 137.5
  8. 64
  9. 140
  10. 12
  11. 24
  12. 2.6
  13. 138
  14. 212.5
  15. 192.5
  16. 17
  17. 60
  18. 4.6
  19. 63
  20. 49
  21. 26
  22. 79
  23. 66
  24. 176
  25. 3.6
  26. 108
  27. 31.5
  28. 142
  29. 165
  30. 16.5
  31. 24
  32. 39
  33. 120
  34. 42
  35. 69
  36. 150
  37. 7.5
  38. 137.5
  39. 55
  40. 45

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