Subtract 12/72 from 1/20
1/20 - 12/72 is -7/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
1/20 = 1 × 18/20 × 18 = 18/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
12/72 = 12 × 5/72 × 5 = 60/360 - Subtract the two like fractions:
18/360 - 60/360 = 18 - 60/360 = -42/360 - After reducing the fraction, the answer is -7/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/20-12/72 1/20-24/72 1/40-12/72 3/20-12/72 1/20-36/72 1/60-12/72 5/20-12/72 1/20-60/72 7/20-12/72 1/20-84/72