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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 317 · 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. 1.50% of 50 =
  2. 2.10% of 470 =
  3. 3.15% of 380 =
  4. 4.5% of 160 =
  5. 5.5% of 650 =
  6. 6.5% of 860 =
  7. 7.5% of 690 =
  8. 8.15% of 270 =
  9. 9.25% of 800 =
  10. 10.10% of 170 =
  11. 11.50% of 130 =
  12. 12.50% of 790 =
  13. 13.20% of 880 =
  14. 14.10% of 90 =
  15. 15.50% of 130 =
  16. 16.50% of 130 =
  17. 17.15% of 450 =
  18. 18.25% of 80 =
  19. 19.1% of 430 =
  20. 20.1% of 710 =
  21. 21.15% of 160 =
  22. 22.15% of 320 =
  23. 23.1% of 110 =
  24. 24.20% of 310 =
  25. 25.10% of 620 =
  26. 26.15% of 530 =
  27. 27.1% of 210 =
  28. 28.1% of 900 =
  29. 29.25% of 550 =
  30. 30.1% of 390 =
  31. 31.20% of 200 =
  32. 32.15% of 850 =
  33. 33.10% of 90 =
  34. 34.1% of 590 =
  35. 35.50% of 110 =
  36. 36.15% of 560 =
  37. 37.15% of 820 =
  38. 38.15% of 560 =
  39. 39.1% of 490 =
  40. 40.25% of 40 =

Answer key

  1. 25
  2. 47
  3. 57
  4. 8
  5. 32.5
  6. 43
  7. 34.5
  8. 40.5
  9. 200
  10. 17
  11. 65
  12. 395
  13. 176
  14. 9
  15. 65
  16. 65
  17. 67.5
  18. 20
  19. 4.3
  20. 7.1
  21. 24
  22. 48
  23. 1.1
  24. 62
  25. 62
  26. 79.5
  27. 2.1
  28. 9
  29. 137.5
  30. 3.9
  31. 40
  32. 127.5
  33. 9
  34. 5.9
  35. 55
  36. 84
  37. 123
  38. 84
  39. 4.9
  40. 10

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