Answers

Add 90/72 and 56/21

1^st number: 1 18/72, 2^nd number: 2 14/21

90/72 + 56/21 is 47/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 21 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 21 × 24 = 504,
   56/21 = 56 × 24/21 × 24 = 1344/504
4. Add the two like fractions:
   630/504 + 1344/504 = 630 + 1344/504 = 1974/504
5. 1974/504 simplified gives 47/12
6. So, 90/72 + 56/21 = 47/12
   In mixed form: 311/12

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