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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 350 · 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. 1.10% of 700 =
  2. 2.5% of 670 =
  3. 3.1% of 220 =
  4. 4.5% of 540 =
  5. 5.5% of 200 =
  6. 6.20% of 350 =
  7. 7.1% of 600 =
  8. 8.50% of 170 =
  9. 9.10% of 370 =
  10. 10.5% of 480 =
  11. 11.10% of 340 =
  12. 12.15% of 570 =
  13. 13.10% of 130 =
  14. 14.15% of 380 =
  15. 15.20% of 640 =
  16. 16.25% of 80 =
  17. 17.5% of 760 =
  18. 18.10% of 780 =
  19. 19.15% of 720 =
  20. 20.20% of 170 =
  21. 21.5% of 50 =
  22. 22.5% of 800 =
  23. 23.5% of 110 =
  24. 24.20% of 710 =
  25. 25.50% of 470 =
  26. 26.5% of 220 =
  27. 27.10% of 370 =
  28. 28.20% of 270 =
  29. 29.25% of 230 =
  30. 30.20% of 340 =
  31. 31.1% of 410 =
  32. 32.20% of 670 =
  33. 33.10% of 490 =
  34. 34.20% of 530 =
  35. 35.25% of 250 =
  36. 36.5% of 20 =
  37. 37.10% of 120 =
  38. 38.15% of 80 =
  39. 39.5% of 320 =
  40. 40.25% of 200 =

Answer key

  1. 70
  2. 33.5
  3. 2.2
  4. 27
  5. 10
  6. 70
  7. 6
  8. 85
  9. 37
  10. 24
  11. 34
  12. 85.5
  13. 13
  14. 57
  15. 128
  16. 20
  17. 38
  18. 78
  19. 108
  20. 34
  21. 2.5
  22. 40
  23. 5.5
  24. 142
  25. 235
  26. 11
  27. 37
  28. 54
  29. 57.5
  30. 68
  31. 4.1
  32. 134
  33. 49
  34. 106
  35. 62.5
  36. 1
  37. 12
  38. 12
  39. 16
  40. 50

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