Subtract 80/30 from 9/49, Solve 9/49

Subtract 80/30 from 9/49

1^st number: 9/49, 2^nd number: 2 20/30

9/49 - 80/30 is -365/147.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 30 is 1470

Next, find the equivalent fraction of both fractional numbers with denominator 1470
For the 1st fraction, since 49 × 30 = 1470,
9/49 = 9 × 30/49 × 30 = 270/1470
Likewise, for the 2nd fraction, since 30 × 49 = 1470,
80/30 = 80 × 49/30 × 49 = 3920/1470
Subtract the two like fractions:
270/1470 - 3920/1470 = 270 - 3920/1470 = -3650/1470
After reducing the fraction, the answer is -365/147

MathStep (Works offline)

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