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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 68 · 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 900 =
  2. 2.10% of 200 =
  3. 3.25% of 820 =
  4. 4.25% of 860 =
  5. 5.10% of 320 =
  6. 6.1% of 60 =
  7. 7.1% of 230 =
  8. 8.50% of 520 =
  9. 9.5% of 280 =
  10. 10.25% of 420 =
  11. 11.5% of 540 =
  12. 12.25% of 490 =
  13. 13.50% of 250 =
  14. 14.10% of 460 =
  15. 15.20% of 680 =
  16. 16.20% of 170 =
  17. 17.10% of 480 =
  18. 18.5% of 660 =
  19. 19.50% of 20 =
  20. 20.5% of 100 =
  21. 21.50% of 490 =
  22. 22.20% of 170 =
  23. 23.10% of 620 =
  24. 24.20% of 130 =
  25. 25.15% of 570 =
  26. 26.10% of 350 =
  27. 27.10% of 840 =
  28. 28.50% of 400 =
  29. 29.20% of 160 =
  30. 30.25% of 170 =
  31. 31.20% of 310 =
  32. 32.20% of 320 =
  33. 33.1% of 370 =
  34. 34.25% of 730 =
  35. 35.15% of 150 =
  36. 36.5% of 460 =
  37. 37.5% of 180 =
  38. 38.10% of 710 =
  39. 39.15% of 550 =
  40. 40.10% of 300 =

Answer key

  1. 180
  2. 20
  3. 205
  4. 215
  5. 32
  6. 0.6
  7. 2.3
  8. 260
  9. 14
  10. 105
  11. 27
  12. 122.5
  13. 125
  14. 46
  15. 136
  16. 34
  17. 48
  18. 33
  19. 10
  20. 5
  21. 245
  22. 34
  23. 62
  24. 26
  25. 85.5
  26. 35
  27. 84
  28. 200
  29. 32
  30. 42.5
  31. 62
  32. 64
  33. 3.7
  34. 182.5
  35. 22.5
  36. 23
  37. 9
  38. 71
  39. 82.5
  40. 30

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