Answers

Add 72/90 and 63/12

1^st number: 72/90, 2^nd number: 5 3/12

72/90 + 63/12 is 121/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 12 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 90 × 2 = 180,
   72/90 = 72 × 2/90 × 2 = 144/180
3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
   63/12 = 63 × 15/12 × 15 = 945/180
4. Add the two like fractions:
   144/180 + 945/180 = 144 + 945/180 = 1089/180
5. 1089/180 simplified gives 121/20
6. So, 72/90 + 63/12 = 121/20
   In mixed form: 61/20

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