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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 447 · 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 840 =
  2. 2.20% of 890 =
  3. 3.1% of 650 =
  4. 4.10% of 840 =
  5. 5.10% of 590 =
  6. 6.25% of 560 =
  7. 7.25% of 170 =
  8. 8.50% of 60 =
  9. 9.10% of 460 =
  10. 10.25% of 580 =
  11. 11.20% of 150 =
  12. 12.1% of 510 =
  13. 13.20% of 580 =
  14. 14.20% of 100 =
  15. 15.20% of 690 =
  16. 16.5% of 750 =
  17. 17.10% of 210 =
  18. 18.1% of 80 =
  19. 19.20% of 600 =
  20. 20.25% of 20 =
  21. 21.5% of 50 =
  22. 22.50% of 540 =
  23. 23.5% of 800 =
  24. 24.25% of 220 =
  25. 25.1% of 310 =
  26. 26.15% of 720 =
  27. 27.1% of 320 =
  28. 28.50% of 740 =
  29. 29.20% of 130 =
  30. 30.10% of 780 =
  31. 31.20% of 850 =
  32. 32.25% of 770 =
  33. 33.1% of 390 =
  34. 34.25% of 850 =
  35. 35.25% of 210 =
  36. 36.20% of 230 =
  37. 37.20% of 840 =
  38. 38.20% of 160 =
  39. 39.10% of 260 =
  40. 40.1% of 240 =

Answer key

  1. 420
  2. 178
  3. 6.5
  4. 84
  5. 59
  6. 140
  7. 42.5
  8. 30
  9. 46
  10. 145
  11. 30
  12. 5.1
  13. 116
  14. 20
  15. 138
  16. 37.5
  17. 21
  18. 0.8
  19. 120
  20. 5
  21. 2.5
  22. 270
  23. 40
  24. 55
  25. 3.1
  26. 108
  27. 3.2
  28. 370
  29. 26
  30. 78
  31. 170
  32. 192.5
  33. 3.9
  34. 212.5
  35. 52.5
  36. 46
  37. 168
  38. 32
  39. 26
  40. 2.4

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