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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 18 · 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. 1.10% of 680 =
  2. 2.10% of 50 =
  3. 3.10% of 840 =
  4. 4.25% of 870 =
  5. 5.10% of 890 =
  6. 6.20% of 100 =
  7. 7.25% of 50 =
  8. 8.5% of 220 =
  9. 9.15% of 220 =
  10. 10.20% of 270 =
  11. 11.50% of 340 =
  12. 12.20% of 540 =
  13. 13.10% of 810 =
  14. 14.25% of 490 =
  15. 15.20% of 840 =
  16. 16.20% of 740 =
  17. 17.1% of 310 =
  18. 18.10% of 540 =
  19. 19.10% of 700 =
  20. 20.25% of 770 =
  21. 21.1% of 700 =
  22. 22.10% of 890 =
  23. 23.10% of 280 =
  24. 24.50% of 440 =
  25. 25.10% of 40 =
  26. 26.15% of 30 =
  27. 27.25% of 140 =
  28. 28.20% of 880 =
  29. 29.5% of 870 =
  30. 30.5% of 900 =
  31. 31.50% of 250 =
  32. 32.50% of 680 =
  33. 33.1% of 580 =
  34. 34.1% of 900 =
  35. 35.25% of 720 =
  36. 36.25% of 710 =
  37. 37.15% of 480 =
  38. 38.10% of 400 =
  39. 39.5% of 790 =
  40. 40.20% of 640 =

Answer key

  1. 68
  2. 5
  3. 84
  4. 217.5
  5. 89
  6. 20
  7. 12.5
  8. 11
  9. 33
  10. 54
  11. 170
  12. 108
  13. 81
  14. 122.5
  15. 168
  16. 148
  17. 3.1
  18. 54
  19. 70
  20. 192.5
  21. 7
  22. 89
  23. 28
  24. 220
  25. 4
  26. 4.5
  27. 35
  28. 176
  29. 43.5
  30. 45
  31. 125
  32. 340
  33. 5.8
  34. 9
  35. 180
  36. 177.5
  37. 72
  38. 40
  39. 39.5
  40. 128

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