Subtract 21/10 from 7/63
1st number: 7/63, 2nd number: 2 1/10
7/63 - 21/10 is -179/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 10 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
7/63 = 7 × 10/63 × 10 = 70/630 - Likewise, for the 2nd fraction, since 10 × 63 = 630,
21/10 = 21 × 63/10 × 63 = 1323/630 - Subtract the two like fractions:
70/630 - 1323/630 = 70 - 1323/630 = -1253/630 - After reducing the fraction, the answer is -179/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/63-21/10 7/63-42/10 7/63-21/20 21/63-21/10 7/63-63/10 7/63-21/30 35/63-21/10 7/63-21/50 49/63-21/10 7/63-21/70