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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 774 · 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 800 =
  2. 2.10% of 620 =
  3. 3.1% of 70 =
  4. 4.25% of 460 =
  5. 5.5% of 110 =
  6. 6.20% of 40 =
  7. 7.10% of 650 =
  8. 8.5% of 210 =
  9. 9.5% of 700 =
  10. 10.5% of 310 =
  11. 11.50% of 680 =
  12. 12.25% of 150 =
  13. 13.1% of 670 =
  14. 14.1% of 300 =
  15. 15.5% of 740 =
  16. 16.10% of 640 =
  17. 17.1% of 240 =
  18. 18.5% of 710 =
  19. 19.25% of 400 =
  20. 20.20% of 70 =
  21. 21.25% of 420 =
  22. 22.20% of 520 =
  23. 23.1% of 400 =
  24. 24.50% of 730 =
  25. 25.50% of 520 =
  26. 26.5% of 160 =
  27. 27.5% of 770 =
  28. 28.5% of 80 =
  29. 29.15% of 330 =
  30. 30.5% of 200 =
  31. 31.50% of 440 =
  32. 32.10% of 530 =
  33. 33.50% of 380 =
  34. 34.5% of 170 =
  35. 35.10% of 40 =
  36. 36.20% of 130 =
  37. 37.25% of 450 =
  38. 38.20% of 780 =
  39. 39.15% of 140 =
  40. 40.50% of 800 =

Answer key

  1. 400
  2. 62
  3. 0.7
  4. 115
  5. 5.5
  6. 8
  7. 65
  8. 10.5
  9. 35
  10. 15.5
  11. 340
  12. 37.5
  13. 6.7
  14. 3
  15. 37
  16. 64
  17. 2.4
  18. 35.5
  19. 100
  20. 14
  21. 105
  22. 104
  23. 4
  24. 365
  25. 260
  26. 8
  27. 38.5
  28. 4
  29. 49.5
  30. 10
  31. 220
  32. 53
  33. 190
  34. 8.5
  35. 4
  36. 26
  37. 112.5
  38. 156
  39. 21
  40. 400

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