Subtract 18/9 from 25/7, Solve 3 4/7

Subtract 18/9 from 25/7

1^st number: 3 4/7, 2^nd number: 2 0/9

25/7 - 18/9 is 11/7.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63

Next, find the equivalent fraction of both fractional numbers with denominator 63
For the 1st fraction, since 7 × 9 = 63,
25/7 = 25 × 9/7 × 9 = 225/63
Likewise, for the 2nd fraction, since 9 × 7 = 63,
18/9 = 18 × 7/9 × 7 = 126/63
Subtract the two like fractions:
225/63 - 126/63 = 225 - 126/63 = 99/63
After reducing the fraction, the answer is 11/7
In mixed form: 14/7

MathStep (Works offline)

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