Answers

Add 90/28 and 60/72

1^st number: 3 6/28, 2^nd number: 60/72

90/28 + 60/72 is 85/21.

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,
   60/72 = 60 × 7/72 × 7 = 420/504
4. Add the two like fractions:
   1620/504 + 420/504 = 1620 + 420/504 = 2040/504
5. 2040/504 simplified gives 85/21
6. So, 90/28 + 60/72 = 85/21
   In mixed form: 41/21

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