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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 650 · 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 140 =
  2. 2.5% of 850 =
  3. 3.10% of 460 =
  4. 4.10% of 260 =
  5. 5.10% of 610 =
  6. 6.25% of 740 =
  7. 7.10% of 50 =
  8. 8.5% of 50 =
  9. 9.20% of 270 =
  10. 10.50% of 630 =
  11. 11.15% of 220 =
  12. 12.20% of 320 =
  13. 13.25% of 20 =
  14. 14.5% of 60 =
  15. 15.20% of 250 =
  16. 16.15% of 240 =
  17. 17.25% of 190 =
  18. 18.50% of 610 =
  19. 19.20% of 820 =
  20. 20.20% of 50 =
  21. 21.5% of 630 =
  22. 22.1% of 60 =
  23. 23.1% of 460 =
  24. 24.20% of 20 =
  25. 25.15% of 480 =
  26. 26.15% of 170 =
  27. 27.25% of 870 =
  28. 28.20% of 100 =
  29. 29.15% of 110 =
  30. 30.1% of 390 =
  31. 31.50% of 760 =
  32. 32.1% of 680 =
  33. 33.5% of 160 =
  34. 34.25% of 480 =
  35. 35.15% of 830 =
  36. 36.10% of 170 =
  37. 37.25% of 80 =
  38. 38.15% of 60 =
  39. 39.10% of 230 =
  40. 40.25% of 120 =

Answer key

  1. 28
  2. 42.5
  3. 46
  4. 26
  5. 61
  6. 185
  7. 5
  8. 2.5
  9. 54
  10. 315
  11. 33
  12. 64
  13. 5
  14. 3
  15. 50
  16. 36
  17. 47.5
  18. 305
  19. 164
  20. 10
  21. 31.5
  22. 0.6
  23. 4.6
  24. 4
  25. 72
  26. 25.5
  27. 217.5
  28. 20
  29. 16.5
  30. 3.9
  31. 380
  32. 6.8
  33. 8
  34. 120
  35. 124.5
  36. 17
  37. 20
  38. 9
  39. 23
  40. 30

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