Add 27/18 and 72/20
1st number: 1 9/18, 2nd number: 3 12/20
27/18 + 72/20 is 51/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
27/18 = 27 × 10/18 × 10 = 270/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
72/20 = 72 × 9/20 × 9 = 648/180 - Add the two like fractions:
270/180 + 648/180 = 270 + 648/180 = 918/180 - 918/180 simplified gives 51/10
- So, 27/18 + 72/20 = 51/10
In mixed form: 51/10
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