Answers

Add 54/72 and 42/28

1^st number: 54/72, 2^nd number: 1 14/28

54/72 + 42/28 is 9/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 28 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   54/72 = 54 × 7/72 × 7 = 378/504
3. Likewise, for the 2nd fraction, since 28 × 18 = 504,
   42/28 = 42 × 18/28 × 18 = 756/504
4. Add the two like fractions:
   378/504 + 756/504 = 378 + 756/504 = 1134/504
5. 1134/504 simplified gives 9/4
6. So, 54/72 + 42/28 = 9/4
   In mixed form: 21/4

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