Subtract 72/30 from 1/20
1st number: 1/20, 2nd number: 2 12/30
1/20 - 72/30 is -47/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
1/20 = 1 × 3/20 × 3 = 3/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
72/30 = 72 × 2/30 × 2 = 144/60 - Subtract the two like fractions:
3/60 - 144/60 = 3 - 144/60 = -141/60 - After reducing the fraction, the answer is -47/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/20-72/30 1/40-72/30 1/20-72/60 3/20-72/30 1/60-72/30 1/20-72/90 5/20-72/30 7/20-72/30