Add 20/28 and 5/15
20/28 + 5/15 is 22/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
20/28 = 20 × 15/28 × 15 = 300/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
5/15 = 5 × 28/15 × 28 = 140/420 - Add the two like fractions:
300/420 + 140/420 = 300 + 140/420 = 440/420 - 440/420 simplified gives 22/21
- So, 20/28 + 5/15 = 22/21
In mixed form: 11/21
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