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Add 21/15 and 20/45

1st number: 1 6/15, 2nd number: 20/45

21/15 + 20/45 is 83/45.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 45 is 45
  2. For the 1st fraction, since 15 × 3 = 45,
    21/15 = 21 × 3/15 × 3 = 63/45
  3. Likewise, for the 2nd fraction, since 45 × 1 = 45,
    20/45 = 20 × 1/45 × 1 = 20/45
  4. Add the two fractions:
    63/45 + 20/45 = 63 + 20/45 = 83/45
  5. So, 21/15 + 20/45 = 83/45
    In mixed form: 138/45

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