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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 624 · 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 170 =
  2. 2.15% of 710 =
  3. 3.20% of 30 =
  4. 4.20% of 20 =
  5. 5.50% of 660 =
  6. 6.15% of 260 =
  7. 7.20% of 720 =
  8. 8.20% of 740 =
  9. 9.50% of 200 =
  10. 10.20% of 320 =
  11. 11.10% of 220 =
  12. 12.10% of 450 =
  13. 13.5% of 740 =
  14. 14.15% of 540 =
  15. 15.20% of 440 =
  16. 16.20% of 170 =
  17. 17.15% of 60 =
  18. 18.20% of 190 =
  19. 19.10% of 460 =
  20. 20.25% of 420 =
  21. 21.1% of 440 =
  22. 22.5% of 100 =
  23. 23.10% of 180 =
  24. 24.5% of 400 =
  25. 25.1% of 20 =
  26. 26.15% of 70 =
  27. 27.25% of 370 =
  28. 28.10% of 180 =
  29. 29.25% of 830 =
  30. 30.50% of 330 =
  31. 31.50% of 790 =
  32. 32.1% of 850 =
  33. 33.50% of 350 =
  34. 34.5% of 860 =
  35. 35.5% of 550 =
  36. 36.50% of 460 =
  37. 37.50% of 730 =
  38. 38.20% of 550 =
  39. 39.5% of 620 =
  40. 40.10% of 180 =

Answer key

  1. 34
  2. 106.5
  3. 6
  4. 4
  5. 330
  6. 39
  7. 144
  8. 148
  9. 100
  10. 64
  11. 22
  12. 45
  13. 37
  14. 81
  15. 88
  16. 34
  17. 9
  18. 38
  19. 46
  20. 105
  21. 4.4
  22. 5
  23. 18
  24. 20
  25. 0.2
  26. 10.5
  27. 92.5
  28. 18
  29. 207.5
  30. 165
  31. 395
  32. 8.5
  33. 175
  34. 43
  35. 27.5
  36. 230
  37. 365
  38. 110
  39. 31
  40. 18

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