Add 21/5 and 3/63, Solve 4 1/5 + 3/63 as a fraction

Add 21/5 and 3/63

1^st number: 4 1/5, 2^nd number: 3/63

21/5 + 3/63 is 446/105.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 63 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 5 × 63 = 315,
21/5 = 21 × 63/5 × 63 = 1323/315
Likewise, for the 2nd fraction, since 63 × 5 = 315,
3/63 = 3 × 5/63 × 5 = 15/315
Add the two like fractions:
1323/315 + 15/315 = 1323 + 15/315 = 1338/315
1338/315 simplified gives 446/105
So, 21/5 + 3/63 = 446/105
In mixed form: 426/105

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