Subtract 18/30 from 5/7
5/7 - 18/30 is 4/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
5/7 = 5 × 30/7 × 30 = 150/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
18/30 = 18 × 7/30 × 7 = 126/210 - Subtract the two like fractions:
150/210 - 126/210 = 150 - 126/210 = 24/210 - After reducing the fraction, the answer is 4/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7-18/30 5/7-36/30 5/14-18/30 5/7-18/60 15/7-18/30 5/7-54/30 5/21-18/30 5/7-18/90 25/7-18/30 5/7-90/30 5/35-18/30 35/7-18/30 5/49-18/30