Add 70/21 and 7/25, Solve 3 7/21 + 7/25 as a fraction

Add 70/21 and 7/25

1^st number: 3 7/21, 2^nd number: 7/25

70/21 + 7/25 is 271/75.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525

Next, find the equivalent fraction of both fractional numbers with denominator 525
For the 1st fraction, since 21 × 25 = 525,
70/21 = 70 × 25/21 × 25 = 1750/525
Likewise, for the 2nd fraction, since 25 × 21 = 525,
7/25 = 7 × 21/25 × 21 = 147/525
Add the two like fractions:
1750/525 + 147/525 = 1750 + 147/525 = 1897/525
1897/525 simplified gives 271/75
So, 70/21 + 7/25 = 271/75
In mixed form: 346/75

MathStep (Works offline)

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