Subtract 20/30 from 7/63
7/63 - 20/30 is -5/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 30 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 30 × 21 = 630,
20/30 = 20 × 21/30 × 21 = 420/630 - Subtract the two like fractions:
70/630 - 420/630 = 70 - 420/630 = -350/630 - After reducing the fraction, the answer is -5/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/63-20/30 7/63-40/30 7/63-20/60 21/63-20/30 7/63-60/30 7/63-20/90 35/63-20/30 49/63-20/30