Subtract 1/20 from 72/4
1st number: 18 0/4, 2nd number: 1/20
72/4 - 1/20 is 359/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
72/4 = 72 × 5/4 × 5 = 360/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
1/20 = 1 × 1/20 × 1 = 1/20 - Subtract the two like fractions:
360/20 - 1/20 = 360 - 1/20 = 359/20 - In mixed form: 1719/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/4-2/20 72/8-1/20 72/4-1/40 72/4-3/20 72/12-1/20 72/4-1/60 72/4-5/20 72/20-1/20 72/4-7/20 72/28-1/20