Add 21/45 and 18/28
21/45 + 18/28 is 233/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 28 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 45 × 28 = 1260,
21/45 = 21 × 28/45 × 28 = 588/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
18/28 = 18 × 45/28 × 45 = 810/1260 - Add the two like fractions:
588/1260 + 810/1260 = 588 + 810/1260 = 1398/1260 - 1398/1260 simplified gives 233/210
- So, 21/45 + 18/28 = 233/210
In mixed form: 123/210
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