Subtract 2/7 from 27/90
27/90 - 2/7 is 1/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
27/90 = 27 × 7/90 × 7 = 189/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
2/7 = 2 × 90/7 × 90 = 180/630 - Subtract the two like fractions:
189/630 - 180/630 = 189 - 180/630 = 9/630 - After reducing the fraction, the answer is 1/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/90-2/7 27/90-4/7 27/90-2/14 81/90-2/7 27/90-6/7 27/90-2/21 27/90-10/7 27/90-2/35 27/90-14/7 27/90-2/49