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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 331 · 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. 1.15% of 300 =
  2. 2.1% of 490 =
  3. 3.5% of 550 =
  4. 4.5% of 150 =
  5. 5.1% of 300 =
  6. 6.1% of 710 =
  7. 7.15% of 710 =
  8. 8.1% of 410 =
  9. 9.25% of 430 =
  10. 10.15% of 60 =
  11. 11.25% of 720 =
  12. 12.10% of 320 =
  13. 13.1% of 170 =
  14. 14.10% of 260 =
  15. 15.50% of 240 =
  16. 16.50% of 360 =
  17. 17.20% of 840 =
  18. 18.25% of 90 =
  19. 19.10% of 560 =
  20. 20.5% of 840 =
  21. 21.50% of 250 =
  22. 22.25% of 590 =
  23. 23.10% of 270 =
  24. 24.5% of 610 =
  25. 25.20% of 870 =
  26. 26.20% of 670 =
  27. 27.20% of 810 =
  28. 28.20% of 660 =
  29. 29.15% of 320 =
  30. 30.1% of 170 =
  31. 31.10% of 160 =
  32. 32.1% of 50 =
  33. 33.15% of 110 =
  34. 34.25% of 170 =
  35. 35.1% of 240 =
  36. 36.25% of 640 =
  37. 37.25% of 390 =
  38. 38.10% of 290 =
  39. 39.10% of 220 =
  40. 40.50% of 830 =

Answer key

  1. 45
  2. 4.9
  3. 27.5
  4. 7.5
  5. 3
  6. 7.1
  7. 106.5
  8. 4.1
  9. 107.5
  10. 9
  11. 180
  12. 32
  13. 1.7
  14. 26
  15. 120
  16. 180
  17. 168
  18. 22.5
  19. 56
  20. 42
  21. 125
  22. 147.5
  23. 27
  24. 30.5
  25. 174
  26. 134
  27. 162
  28. 132
  29. 48
  30. 1.7
  31. 16
  32. 0.5
  33. 16.5
  34. 42.5
  35. 2.4
  36. 160
  37. 97.5
  38. 29
  39. 22
  40. 415

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