Subtract 25/7 from 15/30
1st number: 15/30, 2nd number: 3 4/7
15/30 - 25/7 is -43/14.
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,
15/30 = 15 × 7/30 × 7 = 105/210 - Likewise, for the 2nd fraction, since 7 × 30 = 210,
25/7 = 25 × 30/7 × 30 = 750/210 - Subtract the two like fractions:
105/210 - 750/210 = 105 - 750/210 = -645/210 - After reducing the fraction, the answer is -43/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30-50/7 15/60-25/7 15/30-25/14 45/30-25/7 15/30-75/7 15/90-25/7 15/30-25/21 75/30-25/7 15/30-25/35 15/30-25/49