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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 582 · 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 870 =
  2. 2.5% of 440 =
  3. 3.1% of 800 =
  4. 4.10% of 220 =
  5. 5.25% of 460 =
  6. 6.15% of 500 =
  7. 7.25% of 540 =
  8. 8.15% of 80 =
  9. 9.20% of 190 =
  10. 10.5% of 300 =
  11. 11.50% of 240 =
  12. 12.1% of 130 =
  13. 13.25% of 390 =
  14. 14.25% of 280 =
  15. 15.50% of 440 =
  16. 16.5% of 390 =
  17. 17.25% of 260 =
  18. 18.1% of 570 =
  19. 19.15% of 780 =
  20. 20.20% of 220 =
  21. 21.1% of 570 =
  22. 22.20% of 560 =
  23. 23.5% of 500 =
  24. 24.1% of 340 =
  25. 25.50% of 890 =
  26. 26.50% of 80 =
  27. 27.10% of 100 =
  28. 28.1% of 580 =
  29. 29.20% of 210 =
  30. 30.15% of 120 =
  31. 31.25% of 170 =
  32. 32.5% of 530 =
  33. 33.5% of 380 =
  34. 34.50% of 330 =
  35. 35.50% of 770 =
  36. 36.15% of 360 =
  37. 37.10% of 630 =
  38. 38.5% of 460 =
  39. 39.1% of 70 =
  40. 40.25% of 400 =

Answer key

  1. 130.5
  2. 22
  3. 8
  4. 22
  5. 115
  6. 75
  7. 135
  8. 12
  9. 38
  10. 15
  11. 120
  12. 1.3
  13. 97.5
  14. 70
  15. 220
  16. 19.5
  17. 65
  18. 5.7
  19. 117
  20. 44
  21. 5.7
  22. 112
  23. 25
  24. 3.4
  25. 445
  26. 40
  27. 10
  28. 5.8
  29. 42
  30. 18
  31. 42.5
  32. 26.5
  33. 19
  34. 165
  35. 385
  36. 54
  37. 63
  38. 23
  39. 0.7
  40. 100

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