Subtract 7/8 from 30/45
30/45 - 7/8 is -5/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
30/45 = 30 × 8/45 × 8 = 240/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
7/8 = 7 × 45/8 × 45 = 315/360 - Subtract the two like fractions:
240/360 - 315/360 = 240 - 315/360 = -75/360 - After reducing the fraction, the answer is -5/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/45-7/8 30/45-14/8 30/90-7/8 30/45-7/16 90/45-7/8 30/45-21/8 30/45-7/24 30/45-35/8 30/45-7/40 30/45-49/8 30/45-7/56