Answers

Add 72/60 and 21/20

1^st number: 1 12/60, 2^nd number: 1 1/20

72/60 + 21/20 is 9/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 20 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 60 × 1 = 60,
   72/60 = 72 × 1/60 × 1 = 72/60
3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
   21/20 = 21 × 3/20 × 3 = 63/60
4. Add the two like fractions:
   72/60 + 63/60 = 72 + 63/60 = 135/60
5. 135/60 simplified gives 9/4
6. So, 72/60 + 21/20 = 9/4
   In mixed form: 21/4

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