Answers

Add 90/72 and 21/56

1^st number: 1 18/72, 2^nd number: 21/56

90/72 + 21/56 is 13/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 56 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   90/72 = 90 × 7/72 × 7 = 630/504
3. Likewise, for the 2nd fraction, since 56 × 9 = 504,
   21/56 = 21 × 9/56 × 9 = 189/504
4. Add the two like fractions:
   630/504 + 189/504 = 630 + 189/504 = 819/504
5. 819/504 simplified gives 13/8
6. So, 90/72 + 21/56 = 13/8
   In mixed form: 15/8

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