Subtract 42/50 from 10/72
10/72 - 42/50 is -631/900.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 50 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 72 × 25 = 1800,
10/72 = 10 × 25/72 × 25 = 250/1800 - Likewise, for the 2nd fraction, since 50 × 36 = 1800,
42/50 = 42 × 36/50 × 36 = 1512/1800 - Subtract the two like fractions:
250/1800 - 1512/1800 = 250 - 1512/1800 = -1262/1800 - After reducing the fraction, the answer is -631/900
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/72-42/50 10/72-84/50 30/72-42/50 50/72-42/50 70/72-42/50