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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 351 · 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. 1.5% of 510 =
  2. 2.20% of 390 =
  3. 3.10% of 50 =
  4. 4.20% of 200 =
  5. 5.10% of 880 =
  6. 6.10% of 880 =
  7. 7.10% of 560 =
  8. 8.15% of 870 =
  9. 9.10% of 330 =
  10. 10.15% of 30 =
  11. 11.5% of 330 =
  12. 12.15% of 150 =
  13. 13.25% of 490 =
  14. 14.20% of 370 =
  15. 15.1% of 250 =
  16. 16.20% of 260 =
  17. 17.15% of 850 =
  18. 18.10% of 730 =
  19. 19.20% of 200 =
  20. 20.1% of 420 =
  21. 21.5% of 100 =
  22. 22.10% of 260 =
  23. 23.25% of 240 =
  24. 24.1% of 50 =
  25. 25.25% of 180 =
  26. 26.5% of 320 =
  27. 27.1% of 500 =
  28. 28.15% of 330 =
  29. 29.20% of 570 =
  30. 30.25% of 480 =
  31. 31.20% of 50 =
  32. 32.10% of 210 =
  33. 33.50% of 850 =
  34. 34.5% of 560 =
  35. 35.10% of 130 =
  36. 36.50% of 860 =
  37. 37.20% of 500 =
  38. 38.50% of 560 =
  39. 39.25% of 490 =
  40. 40.25% of 660 =

Answer key

  1. 25.5
  2. 78
  3. 5
  4. 40
  5. 88
  6. 88
  7. 56
  8. 130.5
  9. 33
  10. 4.5
  11. 16.5
  12. 22.5
  13. 122.5
  14. 74
  15. 2.5
  16. 52
  17. 127.5
  18. 73
  19. 40
  20. 4.2
  21. 5
  22. 26
  23. 60
  24. 0.5
  25. 45
  26. 16
  27. 5
  28. 49.5
  29. 114
  30. 120
  31. 10
  32. 21
  33. 425
  34. 28
  35. 13
  36. 430
  37. 100
  38. 280
  39. 122.5
  40. 165

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