Subtract 72/15 from 75/70
1st number: 1 5/70, 2nd number: 4 12/15
75/70 - 72/15 is -261/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
75/70 = 75 × 3/70 × 3 = 225/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
72/15 = 72 × 14/15 × 14 = 1008/210 - Subtract the two like fractions:
225/210 - 1008/210 = 225 - 1008/210 = -783/210 - After reducing the fraction, the answer is -261/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/70-72/30 75/70-72/45 75/70-72/75