Subtract 21/25 from 5/42
5/42 - 21/25 is -757/1050.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 25 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 42 × 25 = 1050,
5/42 = 5 × 25/42 × 25 = 125/1050 - Likewise, for the 2nd fraction, since 25 × 42 = 1050,
21/25 = 21 × 42/25 × 42 = 882/1050 - Subtract the two like fractions:
125/1050 - 882/1050 = 125 - 882/1050 = -757/1050
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/42-21/25 5/42-42/25 5/84-21/25 5/42-21/50 15/42-21/25 5/42-63/25 5/42-21/75 25/42-21/25 35/42-21/25