Subtract 27/40 from 30/7
1st number: 4 2/7, 2nd number: 27/40
30/7 - 27/40 is 1011/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
30/7 = 30 × 40/7 × 40 = 1200/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
27/40 = 27 × 7/40 × 7 = 189/280 - Subtract the two like fractions:
1200/280 - 189/280 = 1200 - 189/280 = 1011/280 - In mixed form: 3171/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/7-27/40 30/7-54/40 30/14-27/40 30/7-27/80 90/7-27/40 30/7-81/40 30/21-27/40 30/35-27/40 30/49-27/40