Subtract 7/70 from 30/63
30/63 - 7/70 is 79/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
30/63 = 30 × 10/63 × 10 = 300/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
7/70 = 7 × 9/70 × 9 = 63/630 - Subtract the two like fractions:
300/630 - 63/630 = 300 - 63/630 = 237/630 - After reducing the fraction, the answer is 79/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/63-7/70 30/63-14/70 90/63-7/70 30/63-21/70 30/63-35/70 30/63-49/70