Subtract 30/63 from 7/30
7/30 - 30/63 is -17/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 30 × 21 = 630,
7/30 = 7 × 21/30 × 21 = 147/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
30/63 = 30 × 10/63 × 10 = 300/630 - Subtract the two like fractions:
147/630 - 300/630 = 147 - 300/630 = -153/630 - After reducing the fraction, the answer is -17/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30-30/63 7/30-60/63 7/60-30/63 21/30-30/63 7/30-90/63 7/90-30/63 35/30-30/63 49/30-30/63