Subtract 7/20 from 72/16
1st number: 4 8/16, 2nd number: 7/20
72/16 - 7/20 is 83/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
72/16 = 72 × 5/16 × 5 = 360/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
7/20 = 7 × 4/20 × 4 = 28/80 - Subtract the two like fractions:
360/80 - 28/80 = 360 - 28/80 = 332/80 - After reducing the fraction, the answer is 83/20
- In mixed form: 43/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/16-14/20 72/32-7/20 72/16-7/40 72/16-21/20 72/48-7/20 72/16-7/60 72/16-35/20 72/80-7/20 72/16-49/20