Subtract 42/45 from 7/25
7/25 - 42/45 is -49/75.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 45 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 25 × 9 = 225,
7/25 = 7 × 9/25 × 9 = 63/225 - Likewise, for the 2nd fraction, since 45 × 5 = 225,
42/45 = 42 × 5/45 × 5 = 210/225 - Subtract the two like fractions:
63/225 - 210/225 = 63 - 210/225 = -147/225 - After reducing the fraction, the answer is -49/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/25-42/45 7/25-84/45 7/50-42/45 7/25-42/90 21/25-42/45 7/75-42/45 35/25-42/45 49/25-42/45