Subtract 72/48 from 21/70
1st number: 21/70, 2nd number: 1 24/48
21/70 - 72/48 is -6/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 48 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 70 × 24 = 1680,
21/70 = 21 × 24/70 × 24 = 504/1680 - Likewise, for the 2nd fraction, since 48 × 35 = 1680,
72/48 = 72 × 35/48 × 35 = 2520/1680 - Subtract the two like fractions:
504/1680 - 2520/1680 = 504 - 2520/1680 = -2016/1680 - After reducing the fraction, the answer is -6/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70-72/48 21/70-72/96 63/70-72/48