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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 374 · 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. 1.10% of 420 =
  2. 2.15% of 280 =
  3. 3.20% of 150 =
  4. 4.20% of 820 =
  5. 5.10% of 240 =
  6. 6.10% of 500 =
  7. 7.50% of 400 =
  8. 8.10% of 290 =
  9. 9.20% of 180 =
  10. 10.5% of 700 =
  11. 11.1% of 590 =
  12. 12.5% of 320 =
  13. 13.15% of 820 =
  14. 14.20% of 690 =
  15. 15.50% of 830 =
  16. 16.25% of 640 =
  17. 17.25% of 370 =
  18. 18.50% of 800 =
  19. 19.5% of 800 =
  20. 20.15% of 310 =
  21. 21.25% of 170 =
  22. 22.20% of 170 =
  23. 23.1% of 820 =
  24. 24.10% of 70 =
  25. 25.1% of 240 =
  26. 26.20% of 190 =
  27. 27.1% of 870 =
  28. 28.50% of 510 =
  29. 29.5% of 250 =
  30. 30.20% of 530 =
  31. 31.20% of 210 =
  32. 32.50% of 110 =
  33. 33.10% of 200 =
  34. 34.50% of 270 =
  35. 35.50% of 350 =
  36. 36.15% of 820 =
  37. 37.1% of 420 =
  38. 38.5% of 320 =
  39. 39.5% of 130 =
  40. 40.50% of 390 =

Answer key

  1. 42
  2. 42
  3. 30
  4. 164
  5. 24
  6. 50
  7. 200
  8. 29
  9. 36
  10. 35
  11. 5.9
  12. 16
  13. 123
  14. 138
  15. 415
  16. 160
  17. 92.5
  18. 400
  19. 40
  20. 46.5
  21. 42.5
  22. 34
  23. 8.2
  24. 7
  25. 2.4
  26. 38
  27. 8.7
  28. 255
  29. 12.5
  30. 106
  31. 42
  32. 55
  33. 20
  34. 135
  35. 175
  36. 123
  37. 4.2
  38. 16
  39. 6.5
  40. 195

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