Subtract 4/5 from 7/45
7/45 - 4/5 is -29/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 5 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
7/45 = 7 × 1/45 × 1 = 7/45 - Likewise, for the 2nd fraction, since 5 × 9 = 45,
4/5 = 4 × 9/5 × 9 = 36/45 - Subtract the two like fractions:
7/45 - 36/45 = 7 - 36/45 = -29/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45-4/5 7/45-8/5 7/90-4/5 7/45-4/10 21/45-4/5 7/45-12/5 7/45-4/15 35/45-4/5 7/45-20/5 7/45-4/25 49/45-4/5 7/45-28/5 7/45-4/35