Add 21/18 and 21/96, Solve 1 3/18 + 21/96 as a fraction

Add 21/18 and 21/96

1^st number: 1 3/18, 2^nd number: 21/96

21/18 + 21/96 is 133/96.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 96 is 288

Next, find the equivalent fraction of both fractional numbers with denominator 288
For the 1st fraction, since 18 × 16 = 288,
21/18 = 21 × 16/18 × 16 = 336/288
Likewise, for the 2nd fraction, since 96 × 3 = 288,
21/96 = 21 × 3/96 × 3 = 63/288
Add the two like fractions:
336/288 + 63/288 = 336 + 63/288 = 399/288
399/288 simplified gives 133/96
So, 21/18 + 21/96 = 133/96
In mixed form: 137/96

MathStep (Works offline)

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