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Add 18/45 and 21/16

1st number: 18/45, 2nd number: 1 5/16

18/45 + 21/16 is 137/80.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 16 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 45 × 16 = 720,
    18/45 = 18 × 16/45 × 16 = 288/720
  3. Likewise, for the 2nd fraction, since 16 × 45 = 720,
    21/16 = 21 × 45/16 × 45 = 945/720
  4. Add the two like fractions:
    288/720 + 945/720 = 288 + 945/720 = 1233/720
  5. 1233/720 simplified gives 137/80
  6. So, 18/45 + 21/16 = 137/80
    In mixed form: 157/80

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