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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 606 · 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. 1.25% of 790 =
  2. 2.50% of 620 =
  3. 3.5% of 110 =
  4. 4.10% of 210 =
  5. 5.1% of 540 =
  6. 6.20% of 330 =
  7. 7.50% of 780 =
  8. 8.10% of 190 =
  9. 9.20% of 240 =
  10. 10.1% of 80 =
  11. 11.10% of 460 =
  12. 12.5% of 600 =
  13. 13.20% of 790 =
  14. 14.50% of 560 =
  15. 15.50% of 700 =
  16. 16.25% of 390 =
  17. 17.50% of 170 =
  18. 18.10% of 110 =
  19. 19.20% of 560 =
  20. 20.25% of 20 =
  21. 21.10% of 160 =
  22. 22.20% of 140 =
  23. 23.5% of 110 =
  24. 24.50% of 850 =
  25. 25.5% of 130 =
  26. 26.1% of 640 =
  27. 27.25% of 600 =
  28. 28.5% of 320 =
  29. 29.1% of 170 =
  30. 30.5% of 730 =
  31. 31.1% of 20 =
  32. 32.10% of 730 =
  33. 33.25% of 840 =
  34. 34.20% of 460 =
  35. 35.50% of 870 =
  36. 36.20% of 270 =
  37. 37.1% of 590 =
  38. 38.25% of 480 =
  39. 39.20% of 630 =
  40. 40.20% of 80 =

Answer key

  1. 197.5
  2. 310
  3. 5.5
  4. 21
  5. 5.4
  6. 66
  7. 390
  8. 19
  9. 48
  10. 0.8
  11. 46
  12. 30
  13. 158
  14. 280
  15. 350
  16. 97.5
  17. 85
  18. 11
  19. 112
  20. 5
  21. 16
  22. 28
  23. 5.5
  24. 425
  25. 6.5
  26. 6.4
  27. 150
  28. 16
  29. 1.7
  30. 36.5
  31. 0.2
  32. 73
  33. 210
  34. 92
  35. 435
  36. 54
  37. 5.9
  38. 120
  39. 126
  40. 16

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