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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 593 · 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 780 =
  2. 2.10% of 180 =
  3. 3.15% of 820 =
  4. 4.1% of 20 =
  5. 5.50% of 800 =
  6. 6.20% of 320 =
  7. 7.20% of 140 =
  8. 8.5% of 320 =
  9. 9.50% of 890 =
  10. 10.1% of 140 =
  11. 11.25% of 860 =
  12. 12.1% of 540 =
  13. 13.20% of 150 =
  14. 14.5% of 130 =
  15. 15.10% of 600 =
  16. 16.1% of 350 =
  17. 17.50% of 260 =
  18. 18.25% of 680 =
  19. 19.20% of 710 =
  20. 20.20% of 870 =
  21. 21.20% of 860 =
  22. 22.10% of 610 =
  23. 23.5% of 450 =
  24. 24.10% of 200 =
  25. 25.15% of 140 =
  26. 26.50% of 620 =
  27. 27.25% of 510 =
  28. 28.10% of 420 =
  29. 29.20% of 620 =
  30. 30.15% of 700 =
  31. 31.20% of 190 =
  32. 32.10% of 100 =
  33. 33.25% of 600 =
  34. 34.50% of 840 =
  35. 35.20% of 640 =
  36. 36.20% of 670 =
  37. 37.15% of 230 =
  38. 38.1% of 150 =
  39. 39.5% of 380 =
  40. 40.5% of 210 =

Answer key

  1. 390
  2. 18
  3. 123
  4. 0.2
  5. 400
  6. 64
  7. 28
  8. 16
  9. 445
  10. 1.4
  11. 215
  12. 5.4
  13. 30
  14. 6.5
  15. 60
  16. 3.5
  17. 130
  18. 170
  19. 142
  20. 174
  21. 172
  22. 61
  23. 22.5
  24. 20
  25. 21
  26. 310
  27. 127.5
  28. 42
  29. 124
  30. 105
  31. 38
  32. 10
  33. 150
  34. 420
  35. 128
  36. 134
  37. 34.5
  38. 1.5
  39. 19
  40. 10.5

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