Answers

Add 90/7 and 84/80

1^st number: 12 6/7, 2^nd number: 1 4/80

90/7 + 84/80 is 1947/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 7 × 80 = 560,
   90/7 = 90 × 80/7 × 80 = 7200/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   84/80 = 84 × 7/80 × 7 = 588/560
4. Add the two like fractions:
   7200/560 + 588/560 = 7200 + 588/560 = 7788/560
5. 7788/560 simplified gives 1947/140
6. So, 90/7 + 84/80 = 1947/140
   In mixed form: 13127/140

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