Add 21/60 and 50/42, Solve 21/60 + 1 8/42 as a fraction

Add 21/60 and 50/42

1^st number: 21/60, 2^nd number: 1 8/42

21/60 + 50/42 is 647/420.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 42 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 60 × 7 = 420,
21/60 = 21 × 7/60 × 7 = 147/420
Likewise, for the 2nd fraction, since 42 × 10 = 420,
50/42 = 50 × 10/42 × 10 = 500/420
Add the two like fractions:
147/420 + 500/420 = 147 + 500/420 = 647/420
So, 21/60 + 50/42 = 647/420
In mixed form: 1227/420

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