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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 689 · 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 180 =
  2. 2.1% of 290 =
  3. 3.10% of 200 =
  4. 4.10% of 90 =
  5. 5.15% of 290 =
  6. 6.50% of 470 =
  7. 7.50% of 380 =
  8. 8.1% of 890 =
  9. 9.25% of 100 =
  10. 10.15% of 880 =
  11. 11.15% of 470 =
  12. 12.20% of 280 =
  13. 13.25% of 450 =
  14. 14.25% of 160 =
  15. 15.15% of 540 =
  16. 16.50% of 310 =
  17. 17.20% of 120 =
  18. 18.5% of 500 =
  19. 19.15% of 710 =
  20. 20.5% of 570 =
  21. 21.25% of 160 =
  22. 22.50% of 590 =
  23. 23.5% of 150 =
  24. 24.10% of 700 =
  25. 25.10% of 880 =
  26. 26.25% of 190 =
  27. 27.25% of 630 =
  28. 28.20% of 170 =
  29. 29.50% of 240 =
  30. 30.10% of 40 =
  31. 31.15% of 450 =
  32. 32.50% of 560 =
  33. 33.15% of 430 =
  34. 34.10% of 540 =
  35. 35.15% of 80 =
  36. 36.50% of 620 =
  37. 37.5% of 720 =
  38. 38.15% of 640 =
  39. 39.20% of 560 =
  40. 40.10% of 60 =

Answer key

  1. 36
  2. 2.9
  3. 20
  4. 9
  5. 43.5
  6. 235
  7. 190
  8. 8.9
  9. 25
  10. 132
  11. 70.5
  12. 56
  13. 112.5
  14. 40
  15. 81
  16. 155
  17. 24
  18. 25
  19. 106.5
  20. 28.5
  21. 40
  22. 295
  23. 7.5
  24. 70
  25. 88
  26. 47.5
  27. 157.5
  28. 34
  29. 120
  30. 4
  31. 67.5
  32. 280
  33. 64.5
  34. 54
  35. 12
  36. 310
  37. 36
  38. 96
  39. 112
  40. 6

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