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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 36 · 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. 1.5% of 70 =
  2. 2.5% of 290 =
  3. 3.5% of 450 =
  4. 4.50% of 610 =
  5. 5.5% of 660 =
  6. 6.20% of 660 =
  7. 7.5% of 230 =
  8. 8.1% of 240 =
  9. 9.20% of 30 =
  10. 10.5% of 450 =
  11. 11.5% of 210 =
  12. 12.50% of 270 =
  13. 13.20% of 760 =
  14. 14.50% of 460 =
  15. 15.25% of 40 =
  16. 16.5% of 80 =
  17. 17.5% of 740 =
  18. 18.50% of 180 =
  19. 19.50% of 210 =
  20. 20.20% of 50 =
  21. 21.5% of 200 =
  22. 22.10% of 290 =
  23. 23.15% of 280 =
  24. 24.20% of 630 =
  25. 25.25% of 560 =
  26. 26.15% of 130 =
  27. 27.1% of 110 =
  28. 28.25% of 540 =
  29. 29.10% of 570 =
  30. 30.1% of 260 =
  31. 31.15% of 850 =
  32. 32.5% of 630 =
  33. 33.20% of 380 =
  34. 34.50% of 470 =
  35. 35.15% of 250 =
  36. 36.1% of 390 =
  37. 37.15% of 280 =
  38. 38.50% of 680 =
  39. 39.20% of 70 =
  40. 40.5% of 620 =

Answer key

  1. 3.5
  2. 14.5
  3. 22.5
  4. 305
  5. 33
  6. 132
  7. 11.5
  8. 2.4
  9. 6
  10. 22.5
  11. 10.5
  12. 135
  13. 152
  14. 230
  15. 10
  16. 4
  17. 37
  18. 90
  19. 105
  20. 10
  21. 10
  22. 29
  23. 42
  24. 126
  25. 140
  26. 19.5
  27. 1.1
  28. 135
  29. 57
  30. 2.6
  31. 127.5
  32. 31.5
  33. 76
  34. 235
  35. 37.5
  36. 3.9
  37. 42
  38. 340
  39. 14
  40. 31

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