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Add 21/56 and 35/45

21/56 + 35/45 is 83/72.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 45 is 2520

    Next, find the equivalent fraction of both fractional numbers with denominator 2520
  2. For the 1st fraction, since 56 × 45 = 2520,
    21/56 = 21 × 45/56 × 45 = 945/2520
  3. Likewise, for the 2nd fraction, since 45 × 56 = 2520,
    35/45 = 35 × 56/45 × 56 = 1960/2520
  4. Add the two like fractions:
    945/2520 + 1960/2520 = 945 + 1960/2520 = 2905/2520
  5. 2905/2520 simplified gives 83/72
  6. So, 21/56 + 35/45 = 83/72
    In mixed form: 111/72

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