Subtract 28/63 from 27/70
27/70 - 28/63 is -37/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
27/70 = 27 × 9/70 × 9 = 243/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
28/63 = 28 × 10/63 × 10 = 280/630 - Subtract the two like fractions:
243/630 - 280/630 = 243 - 280/630 = -37/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/70-28/63 27/70-56/63 81/70-28/63 27/70-84/63