Answers

Add 90/21 and 60/12

1^st number: 4 6/21, 2^nd number: 5 0/12

90/21 + 60/12 is 65/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 12 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   90/21 = 90 × 4/21 × 4 = 360/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   60/12 = 60 × 7/12 × 7 = 420/84
4. Add the two like fractions:
   360/84 + 420/84 = 360 + 420/84 = 780/84
5. 780/84 simplified gives 65/7
6. So, 90/21 + 60/12 = 65/7
   In mixed form: 92/7

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