Subtract 21/25 from 42/98
42/98 - 21/25 is -72/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 25 is 2450
Next, find the equivalent fraction of both fractional numbers with denominator 2450 - For the 1st fraction, since 98 × 25 = 2450,
42/98 = 42 × 25/98 × 25 = 1050/2450 - Likewise, for the 2nd fraction, since 25 × 98 = 2450,
21/25 = 21 × 98/25 × 98 = 2058/2450 - Subtract the two like fractions:
1050/2450 - 2058/2450 = 1050 - 2058/2450 = -1008/2450 - After reducing the fraction, the answer is -72/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/98-21/25 42/98-42/25 42/98-21/50 42/98-63/25 42/98-21/75