Add 21/27 and 7/30
21/27 + 7/30 is 91/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 30 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
21/27 = 21 × 10/27 × 10 = 210/270 - Likewise, for the 2nd fraction, since 30 × 9 = 270,
7/30 = 7 × 9/30 × 9 = 63/270 - Add the two like fractions:
210/270 + 63/270 = 210 + 63/270 = 273/270 - 273/270 simplified gives 91/90
- So, 21/27 + 7/30 = 91/90
In mixed form: 11/90
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