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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 613 · 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. 1.20% of 340 =
  2. 2.15% of 50 =
  3. 3.1% of 70 =
  4. 4.1% of 840 =
  5. 5.10% of 550 =
  6. 6.5% of 260 =
  7. 7.20% of 240 =
  8. 8.50% of 800 =
  9. 9.5% of 40 =
  10. 10.50% of 260 =
  11. 11.10% of 50 =
  12. 12.20% of 530 =
  13. 13.25% of 680 =
  14. 14.20% of 490 =
  15. 15.50% of 150 =
  16. 16.1% of 340 =
  17. 17.1% of 80 =
  18. 18.1% of 410 =
  19. 19.10% of 900 =
  20. 20.50% of 750 =
  21. 21.15% of 630 =
  22. 22.1% of 700 =
  23. 23.1% of 320 =
  24. 24.15% of 330 =
  25. 25.5% of 640 =
  26. 26.15% of 530 =
  27. 27.10% of 310 =
  28. 28.5% of 730 =
  29. 29.20% of 640 =
  30. 30.5% of 190 =
  31. 31.50% of 80 =
  32. 32.50% of 620 =
  33. 33.15% of 380 =
  34. 34.20% of 180 =
  35. 35.20% of 700 =
  36. 36.50% of 180 =
  37. 37.1% of 100 =
  38. 38.5% of 660 =
  39. 39.25% of 610 =
  40. 40.15% of 150 =

Answer key

  1. 68
  2. 7.5
  3. 0.7
  4. 8.4
  5. 55
  6. 13
  7. 48
  8. 400
  9. 2
  10. 130
  11. 5
  12. 106
  13. 170
  14. 98
  15. 75
  16. 3.4
  17. 0.8
  18. 4.1
  19. 90
  20. 375
  21. 94.5
  22. 7
  23. 3.2
  24. 49.5
  25. 32
  26. 79.5
  27. 31
  28. 36.5
  29. 128
  30. 9.5
  31. 40
  32. 310
  33. 57
  34. 36
  35. 140
  36. 90
  37. 1
  38. 33
  39. 152.5
  40. 22.5

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