Subtract 80/63 from 7/30
1st number: 7/30, 2nd number: 1 17/63
7/30 - 80/63 is -653/630.
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,
80/63 = 80 × 10/63 × 10 = 800/630 - Subtract the two like fractions:
147/630 - 800/630 = 147 - 800/630 = -653/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30-80/63 7/60-80/63 21/30-80/63 7/90-80/63 35/30-80/63 49/30-80/63