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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 135 · 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 840 =
  2. 2.1% of 860 =
  3. 3.10% of 880 =
  4. 4.15% of 170 =
  5. 5.10% of 540 =
  6. 6.25% of 490 =
  7. 7.15% of 370 =
  8. 8.1% of 190 =
  9. 9.50% of 710 =
  10. 10.50% of 840 =
  11. 11.5% of 460 =
  12. 12.50% of 40 =
  13. 13.5% of 320 =
  14. 14.25% of 70 =
  15. 15.5% of 870 =
  16. 16.1% of 70 =
  17. 17.1% of 110 =
  18. 18.15% of 880 =
  19. 19.50% of 840 =
  20. 20.50% of 530 =
  21. 21.10% of 690 =
  22. 22.15% of 80 =
  23. 23.10% of 440 =
  24. 24.20% of 490 =
  25. 25.10% of 260 =
  26. 26.25% of 80 =
  27. 27.20% of 140 =
  28. 28.1% of 90 =
  29. 29.1% of 620 =
  30. 30.5% of 510 =
  31. 31.50% of 310 =
  32. 32.20% of 690 =
  33. 33.1% of 130 =
  34. 34.50% of 140 =
  35. 35.5% of 570 =
  36. 36.5% of 150 =
  37. 37.5% of 330 =
  38. 38.1% of 240 =
  39. 39.20% of 600 =
  40. 40.1% of 740 =

Answer key

  1. 168
  2. 8.6
  3. 88
  4. 25.5
  5. 54
  6. 122.5
  7. 55.5
  8. 1.9
  9. 355
  10. 420
  11. 23
  12. 20
  13. 16
  14. 17.5
  15. 43.5
  16. 0.7
  17. 1.1
  18. 132
  19. 420
  20. 265
  21. 69
  22. 12
  23. 44
  24. 98
  25. 26
  26. 20
  27. 28
  28. 0.9
  29. 6.2
  30. 25.5
  31. 155
  32. 138
  33. 1.3
  34. 70
  35. 28.5
  36. 7.5
  37. 16.5
  38. 2.4
  39. 120
  40. 7.4

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