Add 21/14 and 63/60, Solve 1 7/14 + 1 3/60 as a fraction

Add 21/14 and 63/60

1^st number: 1 7/14, 2^nd number: 1 3/60

21/14 + 63/60 is 51/20.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 60 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 14 × 30 = 420,
21/14 = 21 × 30/14 × 30 = 630/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
63/60 = 63 × 7/60 × 7 = 441/420
Add the two like fractions:
630/420 + 441/420 = 630 + 441/420 = 1071/420
1071/420 simplified gives 51/20
So, 21/14 + 63/60 = 51/20
In mixed form: 211/20

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