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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 379 · 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 800 =
  2. 2.10% of 500 =
  3. 3.10% of 540 =
  4. 4.50% of 580 =
  5. 5.10% of 380 =
  6. 6.15% of 510 =
  7. 7.15% of 270 =
  8. 8.50% of 530 =
  9. 9.1% of 220 =
  10. 10.50% of 70 =
  11. 11.5% of 520 =
  12. 12.50% of 530 =
  13. 13.5% of 190 =
  14. 14.1% of 600 =
  15. 15.5% of 200 =
  16. 16.20% of 880 =
  17. 17.20% of 870 =
  18. 18.50% of 710 =
  19. 19.10% of 470 =
  20. 20.5% of 210 =
  21. 21.1% of 440 =
  22. 22.10% of 60 =
  23. 23.15% of 690 =
  24. 24.25% of 240 =
  25. 25.1% of 440 =
  26. 26.10% of 350 =
  27. 27.1% of 210 =
  28. 28.10% of 180 =
  29. 29.20% of 540 =
  30. 30.25% of 590 =
  31. 31.50% of 100 =
  32. 32.50% of 780 =
  33. 33.50% of 90 =
  34. 34.10% of 490 =
  35. 35.15% of 850 =
  36. 36.25% of 330 =
  37. 37.5% of 870 =
  38. 38.20% of 520 =
  39. 39.5% of 180 =
  40. 40.20% of 560 =

Answer key

  1. 160
  2. 50
  3. 54
  4. 290
  5. 38
  6. 76.5
  7. 40.5
  8. 265
  9. 2.2
  10. 35
  11. 26
  12. 265
  13. 9.5
  14. 6
  15. 10
  16. 176
  17. 174
  18. 355
  19. 47
  20. 10.5
  21. 4.4
  22. 6
  23. 103.5
  24. 60
  25. 4.4
  26. 35
  27. 2.1
  28. 18
  29. 108
  30. 147.5
  31. 50
  32. 390
  33. 45
  34. 49
  35. 127.5
  36. 82.5
  37. 43.5
  38. 104
  39. 9
  40. 112

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