Add 21/27 and 63/90
21/27 + 63/90 is 133/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 90 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 90 × 3 = 270,
63/90 = 63 × 3/90 × 3 = 189/270 - Add the two like fractions:
210/270 + 189/270 = 210 + 189/270 = 399/270 - 399/270 simplified gives 133/90
- So, 21/27 + 63/90 = 133/90
In mixed form: 143/90
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