Subtract 7/80 from 5/45
5/45 - 7/80 is 17/720.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
5/45 = 5 × 16/45 × 16 = 80/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
7/80 = 7 × 9/80 × 9 = 63/720 - Subtract the two like fractions:
80/720 - 63/720 = 80 - 63/720 = 17/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/45-7/80 5/45-14/80 5/90-7/80 15/45-7/80 5/45-21/80 25/45-7/80 5/45-35/80 35/45-7/80 5/45-49/80