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Add 72/90 and 15/21

72/90 + 15/21 is 53/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 21 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 90 × 7 = 630,
    72/90 = 72 × 7/90 × 7 = 504/630
  3. Likewise, for the 2nd fraction, since 21 × 30 = 630,
    15/21 = 15 × 30/21 × 30 = 450/630
  4. Add the two like fractions:
    504/630 + 450/630 = 504 + 450/630 = 954/630
  5. 954/630 simplified gives 53/35
  6. So, 72/90 + 15/21 = 53/35
    In mixed form: 118/35

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