Subtract 15/7 from 25/30
1st number: 25/30, 2nd number: 2 1/7
25/30 - 15/7 is -55/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
25/30 = 25 × 7/30 × 7 = 175/210 - Likewise, for the 2nd fraction, since 7 × 30 = 210,
15/7 = 15 × 30/7 × 30 = 450/210 - Subtract the two like fractions:
175/210 - 450/210 = 175 - 450/210 = -275/210 - After reducing the fraction, the answer is -55/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/30-15/7 25/30-30/7 25/60-15/7 25/30-15/14 75/30-15/7 25/30-45/7 25/90-15/7 25/30-15/21 25/30-75/7 25/30-15/35 25/30-15/49