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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 346 · 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 410 =
  2. 2.5% of 390 =
  3. 3.5% of 700 =
  4. 4.5% of 140 =
  5. 5.50% of 520 =
  6. 6.10% of 210 =
  7. 7.20% of 620 =
  8. 8.5% of 580 =
  9. 9.50% of 230 =
  10. 10.10% of 880 =
  11. 11.25% of 700 =
  12. 12.25% of 630 =
  13. 13.50% of 180 =
  14. 14.1% of 760 =
  15. 15.10% of 700 =
  16. 16.1% of 50 =
  17. 17.1% of 750 =
  18. 18.50% of 390 =
  19. 19.1% of 160 =
  20. 20.20% of 820 =
  21. 21.15% of 430 =
  22. 22.15% of 170 =
  23. 23.20% of 800 =
  24. 24.20% of 300 =
  25. 25.25% of 750 =
  26. 26.1% of 220 =
  27. 27.20% of 700 =
  28. 28.25% of 870 =
  29. 29.15% of 880 =
  30. 30.25% of 510 =
  31. 31.1% of 420 =
  32. 32.15% of 280 =
  33. 33.5% of 370 =
  34. 34.1% of 820 =
  35. 35.25% of 510 =
  36. 36.20% of 270 =
  37. 37.5% of 770 =
  38. 38.10% of 520 =
  39. 39.5% of 170 =
  40. 40.50% of 270 =

Answer key

  1. 205
  2. 19.5
  3. 35
  4. 7
  5. 260
  6. 21
  7. 124
  8. 29
  9. 115
  10. 88
  11. 175
  12. 157.5
  13. 90
  14. 7.6
  15. 70
  16. 0.5
  17. 7.5
  18. 195
  19. 1.6
  20. 164
  21. 64.5
  22. 25.5
  23. 160
  24. 60
  25. 187.5
  26. 2.2
  27. 140
  28. 217.5
  29. 132
  30. 127.5
  31. 4.2
  32. 42
  33. 18.5
  34. 8.2
  35. 127.5
  36. 54
  37. 38.5
  38. 52
  39. 8.5
  40. 135

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