Add 20/54 and 24/21, Solve 20/54 + 1 3/21 as a fraction

Add 20/54 and 24/21

1^st number: 20/54, 2^nd number: 1 3/21

20/54 + 24/21 is 286/189.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 54 × 7 = 378,
20/54 = 20 × 7/54 × 7 = 140/378
Likewise, for the 2nd fraction, since 21 × 18 = 378,
24/21 = 24 × 18/21 × 18 = 432/378
Add the two like fractions:
140/378 + 432/378 = 140 + 432/378 = 572/378
572/378 simplified gives 286/189
So, 20/54 + 24/21 = 286/189
In mixed form: 197/189

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