Answers

Add 90/28 and 18/72

1^st number: 3 6/28, 2^nd number: 18/72

90/28 + 18/72 is 97/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 28 × 18 = 504,
   90/28 = 90 × 18/28 × 18 = 1620/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   18/72 = 18 × 7/72 × 7 = 126/504
4. Add the two like fractions:
   1620/504 + 126/504 = 1620 + 126/504 = 1746/504
5. 1746/504 simplified gives 97/28
6. So, 90/28 + 18/72 = 97/28
   In mixed form: 313/28

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