Answers

Add 15/8 and 54/72

1^st number: 1 7/8, 2^nd number: 54/72

15/8 + 54/72 is 21/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 72 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 8 × 9 = 72,
   15/8 = 15 × 9/8 × 9 = 135/72
3. Likewise, for the 2nd fraction, since 72 × 1 = 72,
   54/72 = 54 × 1/72 × 1 = 54/72
4. Add the two like fractions:
   135/72 + 54/72 = 135 + 54/72 = 189/72
5. 189/72 simplified gives 21/8
6. So, 15/8 + 54/72 = 21/8
   In mixed form: 25/8

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