Subtract 72/20 from 3/70
1st number: 3/70, 2nd number: 3 12/20
3/70 - 72/20 is -249/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
3/70 = 3 × 2/70 × 2 = 6/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
72/20 = 72 × 7/20 × 7 = 504/140 - Subtract the two like fractions:
6/140 - 504/140 = 6 - 504/140 = -498/140 - After reducing the fraction, the answer is -249/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/70-72/20 3/70-72/40 9/70-72/20 3/70-72/60 15/70-72/20 21/70-72/20