Add 63/42 and 63/5, Solve 1 21/42 + 12 3/5 as a fraction

Add 63/42 and 63/5

1^st number: 1 21/42, 2^nd number: 12 3/5

63/42 + 63/5 is 141/10.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 5 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
63/42 = 63 × 5/42 × 5 = 315/210
Likewise, for the 2nd fraction, since 5 × 42 = 210,
63/5 = 63 × 42/5 × 42 = 2646/210
Add the two like fractions:
315/210 + 2646/210 = 315 + 2646/210 = 2961/210
2961/210 simplified gives 141/10
So, 63/42 + 63/5 = 141/10
In mixed form: 141/10

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