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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 318 · 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. 1.20% of 210 =
  2. 2.15% of 480 =
  3. 3.20% of 390 =
  4. 4.10% of 610 =
  5. 5.1% of 820 =
  6. 6.10% of 570 =
  7. 7.5% of 170 =
  8. 8.25% of 360 =
  9. 9.10% of 840 =
  10. 10.10% of 420 =
  11. 11.1% of 450 =
  12. 12.50% of 270 =
  13. 13.20% of 550 =
  14. 14.10% of 240 =
  15. 15.5% of 310 =
  16. 16.15% of 750 =
  17. 17.20% of 320 =
  18. 18.50% of 870 =
  19. 19.50% of 710 =
  20. 20.25% of 370 =
  21. 21.5% of 220 =
  22. 22.5% of 40 =
  23. 23.20% of 380 =
  24. 24.20% of 840 =
  25. 25.25% of 810 =
  26. 26.20% of 150 =
  27. 27.25% of 580 =
  28. 28.10% of 510 =
  29. 29.10% of 50 =
  30. 30.50% of 880 =
  31. 31.25% of 160 =
  32. 32.50% of 740 =
  33. 33.10% of 690 =
  34. 34.1% of 500 =
  35. 35.15% of 310 =
  36. 36.20% of 710 =
  37. 37.15% of 550 =
  38. 38.20% of 420 =
  39. 39.20% of 210 =
  40. 40.20% of 700 =

Answer key

  1. 42
  2. 72
  3. 78
  4. 61
  5. 8.2
  6. 57
  7. 8.5
  8. 90
  9. 84
  10. 42
  11. 4.5
  12. 135
  13. 110
  14. 24
  15. 15.5
  16. 112.5
  17. 64
  18. 435
  19. 355
  20. 92.5
  21. 11
  22. 2
  23. 76
  24. 168
  25. 202.5
  26. 30
  27. 145
  28. 51
  29. 5
  30. 440
  31. 40
  32. 370
  33. 69
  34. 5
  35. 46.5
  36. 142
  37. 82.5
  38. 84
  39. 42
  40. 140

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