Subtract 25/32 from 7/42, Solve 7/42

Subtract 25/32 from 7/42

7/42 - 25/32 is -59/96.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 32 is 672

Next, find the equivalent fraction of both fractional numbers with denominator 672
For the 1st fraction, since 42 × 16 = 672,
7/42 = 7 × 16/42 × 16 = 112/672
Likewise, for the 2nd fraction, since 32 × 21 = 672,
25/32 = 25 × 21/32 × 21 = 525/672
Subtract the two like fractions:
112/672 - 525/672 = 112 - 525/672 = -413/672
After reducing the fraction, the answer is -59/96

MathStep (Works offline)

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