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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 139 · 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. 1.25% of 580 =
  2. 2.20% of 420 =
  3. 3.25% of 190 =
  4. 4.50% of 510 =
  5. 5.50% of 200 =
  6. 6.20% of 740 =
  7. 7.1% of 480 =
  8. 8.10% of 780 =
  9. 9.15% of 210 =
  10. 10.25% of 390 =
  11. 11.10% of 320 =
  12. 12.10% of 290 =
  13. 13.15% of 680 =
  14. 14.50% of 890 =
  15. 15.25% of 570 =
  16. 16.25% of 220 =
  17. 17.5% of 400 =
  18. 18.50% of 180 =
  19. 19.5% of 900 =
  20. 20.20% of 860 =
  21. 21.50% of 780 =
  22. 22.10% of 90 =
  23. 23.20% of 730 =
  24. 24.10% of 120 =
  25. 25.50% of 670 =
  26. 26.5% of 260 =
  27. 27.50% of 860 =
  28. 28.10% of 770 =
  29. 29.25% of 80 =
  30. 30.15% of 350 =
  31. 31.15% of 750 =
  32. 32.5% of 250 =
  33. 33.1% of 440 =
  34. 34.15% of 250 =
  35. 35.50% of 370 =
  36. 36.25% of 120 =
  37. 37.5% of 20 =
  38. 38.20% of 840 =
  39. 39.20% of 860 =
  40. 40.20% of 270 =

Answer key

  1. 145
  2. 84
  3. 47.5
  4. 255
  5. 100
  6. 148
  7. 4.8
  8. 78
  9. 31.5
  10. 97.5
  11. 32
  12. 29
  13. 102
  14. 445
  15. 142.5
  16. 55
  17. 20
  18. 90
  19. 45
  20. 172
  21. 390
  22. 9
  23. 146
  24. 12
  25. 335
  26. 13
  27. 430
  28. 77
  29. 20
  30. 52.5
  31. 112.5
  32. 12.5
  33. 4.4
  34. 37.5
  35. 185
  36. 30
  37. 1
  38. 168
  39. 172
  40. 54

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