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Add 54/56 and 21/80

54/56 + 21/80 is 687/560.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 56 × 10 = 560,
    54/56 = 54 × 10/56 × 10 = 540/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    21/80 = 21 × 7/80 × 7 = 147/560
  4. Add the two like fractions:
    540/560 + 147/560 = 540 + 147/560 = 687/560
  5. So, 54/56 + 21/80 = 687/560
    In mixed form: 1127/560

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