Answers

Add 90/72 and 54/4

1^st number: 1 18/72, 2^nd number: 13 2/4

90/72 + 54/4 is 59/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 4 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 72 × 1 = 72,
   90/72 = 90 × 1/72 × 1 = 90/72
3. Likewise, for the 2nd fraction, since 4 × 18 = 72,
   54/4 = 54 × 18/4 × 18 = 972/72
4. Add the two like fractions:
   90/72 + 972/72 = 90 + 972/72 = 1062/72
5. 1062/72 simplified gives 59/4
6. So, 90/72 + 54/4 = 59/4
   In mixed form: 143/4

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