Subtract 7/45 from 1/2
1/2 - 7/45 is 31/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 2 × 45 = 90,
1/2 = 1 × 45/2 × 45 = 45/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
7/45 = 7 × 2/45 × 2 = 14/90 - Subtract the two like fractions:
45/90 - 14/90 = 45 - 14/90 = 31/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 1/2-14/45 1/4-7/45 1/2-7/90 3/2-7/45 1/2-21/45 1/6-7/45 5/2-7/45 1/2-35/45 1/10-7/45 7/2-7/45 1/2-49/45 1/14-7/45