Subtract 7/9 from 30/64, Solve 30/64

Subtract 7/9 from 30/64

30/64 - 7/9 is -89/288.

Find the least common denominator or LCM of the two denominators:
LCM of 64 and 9 is 576

Next, find the equivalent fraction of both fractional numbers with denominator 576
For the 1st fraction, since 64 × 9 = 576,
30/64 = 30 × 9/64 × 9 = 270/576
Likewise, for the 2nd fraction, since 9 × 64 = 576,
7/9 = 7 × 64/9 × 64 = 448/576
Subtract the two like fractions:
270/576 - 448/576 = 270 - 448/576 = -178/576
After reducing the fraction, the answer is -89/288

MathStep (Works offline)

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