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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 269 · 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 380 =
  2. 2.50% of 710 =
  3. 3.50% of 890 =
  4. 4.5% of 30 =
  5. 5.15% of 30 =
  6. 6.50% of 90 =
  7. 7.50% of 760 =
  8. 8.20% of 230 =
  9. 9.20% of 590 =
  10. 10.1% of 420 =
  11. 11.15% of 140 =
  12. 12.10% of 130 =
  13. 13.5% of 250 =
  14. 14.50% of 810 =
  15. 15.20% of 110 =
  16. 16.15% of 90 =
  17. 17.1% of 600 =
  18. 18.50% of 390 =
  19. 19.50% of 650 =
  20. 20.50% of 360 =
  21. 21.25% of 220 =
  22. 22.15% of 250 =
  23. 23.20% of 100 =
  24. 24.50% of 70 =
  25. 25.50% of 370 =
  26. 26.15% of 210 =
  27. 27.20% of 40 =
  28. 28.25% of 230 =
  29. 29.15% of 290 =
  30. 30.15% of 620 =
  31. 31.20% of 300 =
  32. 32.50% of 190 =
  33. 33.20% of 530 =
  34. 34.25% of 160 =
  35. 35.20% of 630 =
  36. 36.15% of 250 =
  37. 37.25% of 190 =
  38. 38.25% of 670 =
  39. 39.25% of 80 =
  40. 40.25% of 340 =

Answer key

  1. 57
  2. 355
  3. 445
  4. 1.5
  5. 4.5
  6. 45
  7. 380
  8. 46
  9. 118
  10. 4.2
  11. 21
  12. 13
  13. 12.5
  14. 405
  15. 22
  16. 13.5
  17. 6
  18. 195
  19. 325
  20. 180
  21. 55
  22. 37.5
  23. 20
  24. 35
  25. 185
  26. 31.5
  27. 8
  28. 57.5
  29. 43.5
  30. 93
  31. 60
  32. 95
  33. 106
  34. 40
  35. 126
  36. 37.5
  37. 47.5
  38. 167.5
  39. 20
  40. 85

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