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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 61 · 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. 1.1% of 220 =
  2. 2.10% of 880 =
  3. 3.20% of 190 =
  4. 4.10% of 280 =
  5. 5.50% of 870 =
  6. 6.10% of 160 =
  7. 7.1% of 710 =
  8. 8.1% of 80 =
  9. 9.50% of 670 =
  10. 10.15% of 260 =
  11. 11.15% of 110 =
  12. 12.5% of 210 =
  13. 13.15% of 130 =
  14. 14.10% of 370 =
  15. 15.5% of 850 =
  16. 16.15% of 710 =
  17. 17.5% of 760 =
  18. 18.5% of 200 =
  19. 19.20% of 360 =
  20. 20.20% of 110 =
  21. 21.20% of 380 =
  22. 22.20% of 640 =
  23. 23.1% of 770 =
  24. 24.10% of 250 =
  25. 25.1% of 770 =
  26. 26.10% of 180 =
  27. 27.5% of 240 =
  28. 28.25% of 840 =
  29. 29.1% of 140 =
  30. 30.20% of 730 =
  31. 31.5% of 240 =
  32. 32.50% of 80 =
  33. 33.25% of 560 =
  34. 34.5% of 550 =
  35. 35.15% of 880 =
  36. 36.25% of 700 =
  37. 37.1% of 460 =
  38. 38.25% of 350 =
  39. 39.25% of 540 =
  40. 40.10% of 710 =

Answer key

  1. 2.2
  2. 88
  3. 38
  4. 28
  5. 435
  6. 16
  7. 7.1
  8. 0.8
  9. 335
  10. 39
  11. 16.5
  12. 10.5
  13. 19.5
  14. 37
  15. 42.5
  16. 106.5
  17. 38
  18. 10
  19. 72
  20. 22
  21. 76
  22. 128
  23. 7.7
  24. 25
  25. 7.7
  26. 18
  27. 12
  28. 210
  29. 1.4
  30. 146
  31. 12
  32. 40
  33. 140
  34. 27.5
  35. 132
  36. 175
  37. 4.6
  38. 87.5
  39. 135
  40. 71

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