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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 483 · 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 420 =
  2. 2.10% of 20 =
  3. 3.20% of 390 =
  4. 4.1% of 410 =
  5. 5.15% of 480 =
  6. 6.50% of 270 =
  7. 7.50% of 280 =
  8. 8.5% of 690 =
  9. 9.50% of 520 =
  10. 10.10% of 830 =
  11. 11.20% of 740 =
  12. 12.10% of 860 =
  13. 13.25% of 340 =
  14. 14.20% of 590 =
  15. 15.10% of 170 =
  16. 16.50% of 770 =
  17. 17.10% of 70 =
  18. 18.25% of 670 =
  19. 19.1% of 790 =
  20. 20.1% of 280 =
  21. 21.15% of 570 =
  22. 22.15% of 300 =
  23. 23.25% of 310 =
  24. 24.25% of 840 =
  25. 25.15% of 650 =
  26. 26.5% of 370 =
  27. 27.50% of 530 =
  28. 28.1% of 410 =
  29. 29.15% of 610 =
  30. 30.15% of 360 =
  31. 31.15% of 450 =
  32. 32.5% of 730 =
  33. 33.50% of 770 =
  34. 34.20% of 440 =
  35. 35.5% of 320 =
  36. 36.50% of 40 =
  37. 37.5% of 830 =
  38. 38.25% of 600 =
  39. 39.15% of 210 =
  40. 40.10% of 270 =

Answer key

  1. 21
  2. 2
  3. 78
  4. 4.1
  5. 72
  6. 135
  7. 140
  8. 34.5
  9. 260
  10. 83
  11. 148
  12. 86
  13. 85
  14. 118
  15. 17
  16. 385
  17. 7
  18. 167.5
  19. 7.9
  20. 2.8
  21. 85.5
  22. 45
  23. 77.5
  24. 210
  25. 97.5
  26. 18.5
  27. 265
  28. 4.1
  29. 91.5
  30. 54
  31. 67.5
  32. 36.5
  33. 385
  34. 88
  35. 16
  36. 20
  37. 41.5
  38. 150
  39. 31.5
  40. 27

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