Add 10/21 and 25/24, Solve 10/21 + 1 1/24 as a fraction

Add 10/21 and 25/24

1^st number: 10/21, 2^nd number: 1 1/24

10/21 + 25/24 is 85/56.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 21 × 8 = 168,
10/21 = 10 × 8/21 × 8 = 80/168
Likewise, for the 2nd fraction, since 24 × 7 = 168,
25/24 = 25 × 7/24 × 7 = 175/168
Add the two like fractions:
80/168 + 175/168 = 80 + 175/168 = 255/168
255/168 simplified gives 85/56
So, 10/21 + 25/24 = 85/56
In mixed form: 129/56

MathStep (Works offline)

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