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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 301 · 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. 1.25% of 180 =
  2. 2.50% of 150 =
  3. 3.10% of 210 =
  4. 4.50% of 680 =
  5. 5.5% of 670 =
  6. 6.50% of 870 =
  7. 7.15% of 620 =
  8. 8.50% of 160 =
  9. 9.50% of 410 =
  10. 10.15% of 170 =
  11. 11.1% of 170 =
  12. 12.50% of 750 =
  13. 13.10% of 350 =
  14. 14.10% of 330 =
  15. 15.5% of 440 =
  16. 16.20% of 340 =
  17. 17.5% of 600 =
  18. 18.1% of 50 =
  19. 19.15% of 700 =
  20. 20.10% of 480 =
  21. 21.5% of 790 =
  22. 22.5% of 860 =
  23. 23.15% of 370 =
  24. 24.10% of 600 =
  25. 25.10% of 20 =
  26. 26.25% of 540 =
  27. 27.10% of 820 =
  28. 28.50% of 820 =
  29. 29.15% of 830 =
  30. 30.50% of 100 =
  31. 31.20% of 790 =
  32. 32.15% of 390 =
  33. 33.20% of 690 =
  34. 34.50% of 570 =
  35. 35.5% of 170 =
  36. 36.25% of 220 =
  37. 37.5% of 650 =
  38. 38.50% of 200 =
  39. 39.15% of 220 =
  40. 40.10% of 470 =

Answer key

  1. 45
  2. 75
  3. 21
  4. 340
  5. 33.5
  6. 435
  7. 93
  8. 80
  9. 205
  10. 25.5
  11. 1.7
  12. 375
  13. 35
  14. 33
  15. 22
  16. 68
  17. 30
  18. 0.5
  19. 105
  20. 48
  21. 39.5
  22. 43
  23. 55.5
  24. 60
  25. 2
  26. 135
  27. 82
  28. 410
  29. 124.5
  30. 50
  31. 158
  32. 58.5
  33. 138
  34. 285
  35. 8.5
  36. 55
  37. 32.5
  38. 100
  39. 33
  40. 47

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