Answers

Add 72/84 and 90/18

1^st number: 72/84, 2^nd number: 5 0/18

72/84 + 90/18 is 41/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 18 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 84 × 3 = 252,
   72/84 = 72 × 3/84 × 3 = 216/252
3. Likewise, for the 2nd fraction, since 18 × 14 = 252,
   90/18 = 90 × 14/18 × 14 = 1260/252
4. Add the two like fractions:
   216/252 + 1260/252 = 216 + 1260/252 = 1476/252
5. 1476/252 simplified gives 41/7
6. So, 72/84 + 90/18 = 41/7
   In mixed form: 56/7

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