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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 128 · 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 310 =
  2. 2.1% of 200 =
  3. 3.25% of 570 =
  4. 4.5% of 680 =
  5. 5.20% of 790 =
  6. 6.10% of 210 =
  7. 7.20% of 520 =
  8. 8.25% of 890 =
  9. 9.15% of 900 =
  10. 10.20% of 210 =
  11. 11.50% of 740 =
  12. 12.5% of 790 =
  13. 13.20% of 740 =
  14. 14.10% of 760 =
  15. 15.1% of 390 =
  16. 16.1% of 750 =
  17. 17.20% of 220 =
  18. 18.5% of 500 =
  19. 19.50% of 610 =
  20. 20.1% of 100 =
  21. 21.15% of 840 =
  22. 22.1% of 630 =
  23. 23.15% of 470 =
  24. 24.10% of 240 =
  25. 25.10% of 40 =
  26. 26.15% of 170 =
  27. 27.25% of 450 =
  28. 28.1% of 740 =
  29. 29.5% of 340 =
  30. 30.10% of 450 =
  31. 31.20% of 610 =
  32. 32.50% of 540 =
  33. 33.15% of 250 =
  34. 34.20% of 720 =
  35. 35.50% of 730 =
  36. 36.25% of 210 =
  37. 37.1% of 560 =
  38. 38.10% of 450 =
  39. 39.10% of 290 =
  40. 40.10% of 400 =

Answer key

  1. 155
  2. 2
  3. 142.5
  4. 34
  5. 158
  6. 21
  7. 104
  8. 222.5
  9. 135
  10. 42
  11. 370
  12. 39.5
  13. 148
  14. 76
  15. 3.9
  16. 7.5
  17. 44
  18. 25
  19. 305
  20. 1
  21. 126
  22. 6.3
  23. 70.5
  24. 24
  25. 4
  26. 25.5
  27. 112.5
  28. 7.4
  29. 17
  30. 45
  31. 122
  32. 270
  33. 37.5
  34. 144
  35. 365
  36. 52.5
  37. 5.6
  38. 45
  39. 29
  40. 40

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