Add 96/21 and 12/9, Solve 4 12/21 + 1 3/9 as a fraction

Add 96/21 and 12/9

1^st number: 4 12/21, 2^nd number: 1 3/9

96/21 + 12/9 is 124/21.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63

Next, find the equivalent fraction of both fractional numbers with denominator 63
For the 1st fraction, since 21 × 3 = 63,
96/21 = 96 × 3/21 × 3 = 288/63
Likewise, for the 2nd fraction, since 9 × 7 = 63,
12/9 = 12 × 7/9 × 7 = 84/63
Add the two like fractions:
288/63 + 84/63 = 288 + 84/63 = 372/63
372/63 simplified gives 124/21
So, 96/21 + 12/9 = 124/21
In mixed form: 519/21

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad