Answers

Add 7/72 and 21/16

1^st number: 7/72, 2^nd number: 1 5/16

7/72 + 21/16 is 203/144.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 16 is 144
   
   Next, find the equivalent fraction of both fractional numbers with denominator 144
2. For the 1st fraction, since 72 × 2 = 144,
   7/72 = 7 × 2/72 × 2 = 14/144
3. Likewise, for the 2nd fraction, since 16 × 9 = 144,
   21/16 = 21 × 9/16 × 9 = 189/144
4. Add the two like fractions:
   14/144 + 189/144 = 14 + 189/144 = 203/144
5. So, 7/72 + 21/16 = 203/144
   In mixed form: 159/144

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