Add 18/36 and 80/21
1st number: 18/36, 2nd number: 3 17/21
18/36 + 80/21 is 181/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
18/36 = 18 × 7/36 × 7 = 126/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
80/21 = 80 × 12/21 × 12 = 960/252 - Add the two like fractions:
126/252 + 960/252 = 126 + 960/252 = 1086/252 - 1086/252 simplified gives 181/42
- So, 18/36 + 80/21 = 181/42
In mixed form: 413/42
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