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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 608 · 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 20 =
  2. 2.5% of 390 =
  3. 3.25% of 480 =
  4. 4.50% of 430 =
  5. 5.1% of 310 =
  6. 6.5% of 130 =
  7. 7.10% of 610 =
  8. 8.15% of 260 =
  9. 9.15% of 710 =
  10. 10.5% of 620 =
  11. 11.25% of 290 =
  12. 12.1% of 390 =
  13. 13.50% of 40 =
  14. 14.15% of 70 =
  15. 15.50% of 840 =
  16. 16.15% of 590 =
  17. 17.10% of 20 =
  18. 18.10% of 110 =
  19. 19.1% of 240 =
  20. 20.50% of 470 =
  21. 21.15% of 100 =
  22. 22.50% of 430 =
  23. 23.20% of 550 =
  24. 24.15% of 880 =
  25. 25.50% of 400 =
  26. 26.10% of 410 =
  27. 27.10% of 800 =
  28. 28.1% of 500 =
  29. 29.15% of 40 =
  30. 30.5% of 140 =
  31. 31.15% of 410 =
  32. 32.1% of 190 =
  33. 33.5% of 180 =
  34. 34.20% of 250 =
  35. 35.20% of 550 =
  36. 36.20% of 840 =
  37. 37.20% of 350 =
  38. 38.15% of 370 =
  39. 39.50% of 880 =
  40. 40.15% of 340 =

Answer key

  1. 5
  2. 19.5
  3. 120
  4. 215
  5. 3.1
  6. 6.5
  7. 61
  8. 39
  9. 106.5
  10. 31
  11. 72.5
  12. 3.9
  13. 20
  14. 10.5
  15. 420
  16. 88.5
  17. 2
  18. 11
  19. 2.4
  20. 235
  21. 15
  22. 215
  23. 110
  24. 132
  25. 200
  26. 41
  27. 80
  28. 5
  29. 6
  30. 7
  31. 61.5
  32. 1.9
  33. 9
  34. 50
  35. 110
  36. 168
  37. 70
  38. 55.5
  39. 440
  40. 51

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