Add 21/45 and 9/28
21/45 + 9/28 is 331/420.
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,
9/28 = 9 × 45/28 × 45 = 405/1260 - Add the two like fractions:
588/1260 + 405/1260 = 588 + 405/1260 = 993/1260 - 993/1260 simplified gives 331/420
- So, 21/45 + 9/28 = 331/420
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