Add 28/60 and 20/21
28/60 + 20/21 is 149/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
28/60 = 28 × 7/60 × 7 = 196/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
20/21 = 20 × 20/21 × 20 = 400/420 - Add the two like fractions:
196/420 + 400/420 = 196 + 400/420 = 596/420 - 596/420 simplified gives 149/105
- So, 28/60 + 20/21 = 149/105
In mixed form: 144/105
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