Add 27/20 and 30/21
1st number: 1 7/20, 2nd number: 1 9/21
27/20 + 30/21 is 389/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
27/20 = 27 × 21/20 × 21 = 567/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
30/21 = 30 × 20/21 × 20 = 600/420 - Add the two like fractions:
567/420 + 600/420 = 567 + 600/420 = 1167/420 - 1167/420 simplified gives 389/140
- So, 27/20 + 30/21 = 389/140
In mixed form: 2109/140
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