Add 4/21 and 63/60, Solve 4/21 + 1 3/60 as a fraction

Add 4/21 and 63/60

1^st number: 4/21, 2^nd number: 1 3/60

4/21 + 63/60 is 521/420.

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,
4/21 = 4 × 20/21 × 20 = 80/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
63/60 = 63 × 7/60 × 7 = 441/420
Add the two like fractions:
80/420 + 441/420 = 80 + 441/420 = 521/420
So, 4/21 + 63/60 = 521/420
In mixed form: 1101/420

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