Subtract 63/70 from 21/25
21/25 - 63/70 is -3/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 70 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 25 × 14 = 350,
21/25 = 21 × 14/25 × 14 = 294/350 - Likewise, for the 2nd fraction, since 70 × 5 = 350,
63/70 = 63 × 5/70 × 5 = 315/350 - Subtract the two like fractions:
294/350 - 315/350 = 294 - 315/350 = -21/350 - After reducing the fraction, the answer is -3/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25-63/70 21/50-63/70 63/25-63/70 21/75-63/70