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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 355 · 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. 1.15% of 890 =
  2. 2.50% of 880 =
  3. 3.10% of 630 =
  4. 4.5% of 850 =
  5. 5.50% of 200 =
  6. 6.5% of 270 =
  7. 7.20% of 690 =
  8. 8.5% of 510 =
  9. 9.5% of 680 =
  10. 10.1% of 100 =
  11. 11.5% of 240 =
  12. 12.15% of 200 =
  13. 13.10% of 820 =
  14. 14.10% of 260 =
  15. 15.50% of 810 =
  16. 16.10% of 500 =
  17. 17.5% of 150 =
  18. 18.20% of 870 =
  19. 19.15% of 610 =
  20. 20.25% of 470 =
  21. 21.10% of 590 =
  22. 22.20% of 110 =
  23. 23.15% of 580 =
  24. 24.15% of 390 =
  25. 25.50% of 20 =
  26. 26.50% of 230 =
  27. 27.50% of 270 =
  28. 28.15% of 320 =
  29. 29.1% of 480 =
  30. 30.5% of 140 =
  31. 31.15% of 890 =
  32. 32.20% of 740 =
  33. 33.10% of 180 =
  34. 34.20% of 440 =
  35. 35.5% of 70 =
  36. 36.15% of 100 =
  37. 37.5% of 160 =
  38. 38.20% of 720 =
  39. 39.50% of 340 =
  40. 40.5% of 240 =

Answer key

  1. 133.5
  2. 440
  3. 63
  4. 42.5
  5. 100
  6. 13.5
  7. 138
  8. 25.5
  9. 34
  10. 1
  11. 12
  12. 30
  13. 82
  14. 26
  15. 405
  16. 50
  17. 7.5
  18. 174
  19. 91.5
  20. 117.5
  21. 59
  22. 22
  23. 87
  24. 58.5
  25. 10
  26. 115
  27. 135
  28. 48
  29. 4.8
  30. 7
  31. 133.5
  32. 148
  33. 18
  34. 88
  35. 3.5
  36. 15
  37. 8
  38. 144
  39. 170
  40. 12

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