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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 81 · 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. 1.1% of 520 =
  2. 2.10% of 830 =
  3. 3.20% of 540 =
  4. 4.50% of 420 =
  5. 5.50% of 360 =
  6. 6.50% of 370 =
  7. 7.25% of 880 =
  8. 8.5% of 390 =
  9. 9.50% of 870 =
  10. 10.1% of 390 =
  11. 11.50% of 660 =
  12. 12.10% of 680 =
  13. 13.15% of 640 =
  14. 14.20% of 120 =
  15. 15.5% of 180 =
  16. 16.5% of 150 =
  17. 17.10% of 510 =
  18. 18.10% of 200 =
  19. 19.15% of 860 =
  20. 20.20% of 160 =
  21. 21.10% of 70 =
  22. 22.10% of 70 =
  23. 23.50% of 330 =
  24. 24.50% of 270 =
  25. 25.5% of 740 =
  26. 26.50% of 440 =
  27. 27.1% of 350 =
  28. 28.1% of 340 =
  29. 29.5% of 60 =
  30. 30.20% of 20 =
  31. 31.1% of 310 =
  32. 32.50% of 410 =
  33. 33.10% of 110 =
  34. 34.5% of 720 =
  35. 35.5% of 730 =
  36. 36.5% of 490 =
  37. 37.5% of 520 =
  38. 38.15% of 290 =
  39. 39.20% of 370 =
  40. 40.50% of 660 =

Answer key

  1. 5.2
  2. 83
  3. 108
  4. 210
  5. 180
  6. 185
  7. 220
  8. 19.5
  9. 435
  10. 3.9
  11. 330
  12. 68
  13. 96
  14. 24
  15. 9
  16. 7.5
  17. 51
  18. 20
  19. 129
  20. 32
  21. 7
  22. 7
  23. 165
  24. 135
  25. 37
  26. 220
  27. 3.5
  28. 3.4
  29. 3
  30. 4
  31. 3.1
  32. 205
  33. 11
  34. 36
  35. 36.5
  36. 24.5
  37. 26
  38. 43.5
  39. 74
  40. 330

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