Subtract 1/70 from 72/20
1st number: 3 12/20, 2nd number: 1/70
72/20 - 1/70 is 251/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
72/20 = 72 × 7/20 × 7 = 504/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
1/70 = 1 × 2/70 × 2 = 2/140 - Subtract the two like fractions:
504/140 - 2/140 = 504 - 2/140 = 502/140 - After reducing the fraction, the answer is 251/70
- In mixed form: 341/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20-2/70 72/40-1/70 72/20-3/70 72/60-1/70 72/20-5/70 72/20-7/70