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Add 21/70 and 28/36

21/70 + 28/36 is 97/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 36 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 70 × 18 = 1260,
    21/70 = 21 × 18/70 × 18 = 378/1260
  3. Likewise, for the 2nd fraction, since 36 × 35 = 1260,
    28/36 = 28 × 35/36 × 35 = 980/1260
  4. Add the two like fractions:
    378/1260 + 980/1260 = 378 + 980/1260 = 1358/1260
  5. 1358/1260 simplified gives 97/90
  6. So, 21/70 + 28/36 = 97/90
    In mixed form: 17/90

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