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Add 72/90 and 63/42

1st number: 72/90, 2nd number: 1 21/42

72/90 + 63/42 is 23/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 42 is 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 42 × 15 = 630,
    63/42 = 63 × 15/42 × 15 = 945/630
  4. Add the two fractions:
    504/630 + 945/630 = 504 + 945/630 = 1449/630
  5. After reducing the fraction, the answer is 23/10
  6. In mixed form: 23/10

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