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Add 18/70 and 20/80

18/70 + 20/80 is 71/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 70 × 8 = 560,
    18/70 = 18 × 8/70 × 8 = 144/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    20/80 = 20 × 7/80 × 7 = 140/560
  4. Add the two like fractions:
    144/560 + 140/560 = 144 + 140/560 = 284/560
  5. 284/560 simplified gives 71/140
  6. So, 18/70 + 20/80 = 71/140

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