Add 20/21 and 54/60
20/21 + 54/60 is 389/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
20/21 = 20 × 20/21 × 20 = 400/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
54/60 = 54 × 7/60 × 7 = 378/420 - Add the two like fractions:
400/420 + 378/420 = 400 + 378/420 = 778/420 - 778/420 simplified gives 389/210
- So, 20/21 + 54/60 = 389/210
In mixed form: 1179/210
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