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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 463 · 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. 1.50% of 580 =
  2. 2.25% of 80 =
  3. 3.25% of 160 =
  4. 4.15% of 130 =
  5. 5.5% of 880 =
  6. 6.15% of 140 =
  7. 7.50% of 20 =
  8. 8.5% of 210 =
  9. 9.25% of 370 =
  10. 10.20% of 880 =
  11. 11.10% of 430 =
  12. 12.25% of 470 =
  13. 13.15% of 130 =
  14. 14.10% of 650 =
  15. 15.1% of 180 =
  16. 16.5% of 640 =
  17. 17.15% of 330 =
  18. 18.1% of 770 =
  19. 19.15% of 520 =
  20. 20.20% of 530 =
  21. 21.25% of 170 =
  22. 22.5% of 790 =
  23. 23.10% of 630 =
  24. 24.10% of 550 =
  25. 25.15% of 500 =
  26. 26.1% of 890 =
  27. 27.10% of 310 =
  28. 28.50% of 220 =
  29. 29.5% of 130 =
  30. 30.20% of 740 =
  31. 31.50% of 310 =
  32. 32.5% of 470 =
  33. 33.10% of 390 =
  34. 34.15% of 460 =
  35. 35.15% of 760 =
  36. 36.15% of 850 =
  37. 37.25% of 430 =
  38. 38.5% of 340 =
  39. 39.1% of 420 =
  40. 40.25% of 620 =

Answer key

  1. 290
  2. 20
  3. 40
  4. 19.5
  5. 44
  6. 21
  7. 10
  8. 10.5
  9. 92.5
  10. 176
  11. 43
  12. 117.5
  13. 19.5
  14. 65
  15. 1.8
  16. 32
  17. 49.5
  18. 7.7
  19. 78
  20. 106
  21. 42.5
  22. 39.5
  23. 63
  24. 55
  25. 75
  26. 8.9
  27. 31
  28. 110
  29. 6.5
  30. 148
  31. 155
  32. 23.5
  33. 39
  34. 69
  35. 114
  36. 127.5
  37. 107.5
  38. 17
  39. 4.2
  40. 155

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