Subtract 7/42 from 1/25, Solve 1/25

Subtract 7/42 from 1/25

1/25 - 7/42 is -19/150.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 42 is 1050

Next, find the equivalent fraction of both fractional numbers with denominator 1050
For the 1st fraction, since 25 × 42 = 1050,
1/25 = 1 × 42/25 × 42 = 42/1050
Likewise, for the 2nd fraction, since 42 × 25 = 1050,
7/42 = 7 × 25/42 × 25 = 175/1050
Subtract the two like fractions:
42/1050 - 175/1050 = 42 - 175/1050 = -133/1050
After reducing the fraction, the answer is -19/150

MathStep (Works offline)

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