Add 27/90 and 21/28
27/90 + 21/28 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 28 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 90 × 14 = 1260,
27/90 = 27 × 14/90 × 14 = 378/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
21/28 = 21 × 45/28 × 45 = 945/1260 - Add the two like fractions:
378/1260 + 945/1260 = 378 + 945/1260 = 1323/1260 - 1323/1260 simplified gives 21/20
- So, 27/90 + 21/28 = 21/20
In mixed form: 11/20
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