Add 21/25 and 84/9, Solve 21/25 + 9 3/9 as a fraction

Add 21/25 and 84/9

1^st number: 21/25, 2^nd number: 9 3/9

21/25 + 84/9 is 763/75.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 9 is 225

Next, find the equivalent fraction of both fractional numbers with denominator 225
For the 1st fraction, since 25 × 9 = 225,
21/25 = 21 × 9/25 × 9 = 189/225
Likewise, for the 2nd fraction, since 9 × 25 = 225,
84/9 = 84 × 25/9 × 25 = 2100/225
Add the two like fractions:
189/225 + 2100/225 = 189 + 2100/225 = 2289/225
2289/225 simplified gives 763/75
So, 21/25 + 84/9 = 763/75
In mixed form: 1013/75

MathStep (Works offline)

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