Subtract 35/48 from 30/45, Solve 30/45

Subtract 35/48 from 30/45

30/45 - 35/48 is -1/16.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 48 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 45 × 16 = 720,
30/45 = 30 × 16/45 × 16 = 480/720
Likewise, for the 2nd fraction, since 48 × 15 = 720,
35/48 = 35 × 15/48 × 15 = 525/720
Subtract the two like fractions:
480/720 - 525/720 = 480 - 525/720 = -45/720
After reducing the fraction, the answer is -1/16

MathStep (Works offline)

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