Add 27/20 and 21/90
1st number: 1 7/20, 2nd number: 21/90
27/20 + 21/90 is 19/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
27/20 = 27 × 9/20 × 9 = 243/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180 - Add the two like fractions:
243/180 + 42/180 = 243 + 42/180 = 285/180 - 285/180 simplified gives 19/12
- So, 27/20 + 21/90 = 19/12
In mixed form: 17/12
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