Subtract 27/72 from 4/20
4/20 - 27/72 is -7/40.
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,
4/20 = 4 × 18/20 × 18 = 72/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
27/72 = 27 × 5/72 × 5 = 135/360 - Subtract the two like fractions:
72/360 - 135/360 = 72 - 135/360 = -63/360 - After reducing the fraction, the answer is -7/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/20-27/72 4/20-54/72 4/40-27/72 12/20-27/72 4/20-81/72 4/60-27/72 28/20-27/72