Add 20/60 and 21/28
20/60 + 21/28 is 13/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
20/60 = 20 × 7/60 × 7 = 140/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
21/28 = 21 × 15/28 × 15 = 315/420 - Add the two like fractions:
140/420 + 315/420 = 140 + 315/420 = 455/420 - 455/420 simplified gives 13/12
- So, 20/60 + 21/28 = 13/12
In mixed form: 11/12
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