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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 574 · 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 420 =
  2. 2.1% of 100 =
  3. 3.5% of 780 =
  4. 4.15% of 380 =
  5. 5.5% of 300 =
  6. 6.1% of 210 =
  7. 7.50% of 130 =
  8. 8.50% of 510 =
  9. 9.1% of 20 =
  10. 10.10% of 430 =
  11. 11.25% of 690 =
  12. 12.1% of 90 =
  13. 13.10% of 740 =
  14. 14.1% of 320 =
  15. 15.5% of 830 =
  16. 16.50% of 660 =
  17. 17.10% of 880 =
  18. 18.10% of 280 =
  19. 19.10% of 470 =
  20. 20.1% of 770 =
  21. 21.25% of 230 =
  22. 22.15% of 700 =
  23. 23.5% of 230 =
  24. 24.5% of 560 =
  25. 25.50% of 70 =
  26. 26.15% of 860 =
  27. 27.20% of 500 =
  28. 28.5% of 190 =
  29. 29.50% of 680 =
  30. 30.50% of 40 =
  31. 31.10% of 200 =
  32. 32.10% of 900 =
  33. 33.10% of 240 =
  34. 34.50% of 310 =
  35. 35.15% of 170 =
  36. 36.25% of 150 =
  37. 37.50% of 260 =
  38. 38.20% of 550 =
  39. 39.50% of 180 =
  40. 40.50% of 420 =

Answer key

  1. 210
  2. 1
  3. 39
  4. 57
  5. 15
  6. 2.1
  7. 65
  8. 255
  9. 0.2
  10. 43
  11. 172.5
  12. 0.9
  13. 74
  14. 3.2
  15. 41.5
  16. 330
  17. 88
  18. 28
  19. 47
  20. 7.7
  21. 57.5
  22. 105
  23. 11.5
  24. 28
  25. 35
  26. 129
  27. 100
  28. 9.5
  29. 340
  30. 20
  31. 20
  32. 90
  33. 24
  34. 155
  35. 25.5
  36. 37.5
  37. 130
  38. 110
  39. 90
  40. 210

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