Subtract 7/4 from 30/45
1st number: 30/45, 2nd number: 1 3/4
30/45 - 7/4 is -13/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 4 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
30/45 = 30 × 4/45 × 4 = 120/180 - Likewise, for the 2nd fraction, since 4 × 45 = 180,
7/4 = 7 × 45/4 × 45 = 315/180 - Subtract the two like fractions:
120/180 - 315/180 = 120 - 315/180 = -195/180 - After reducing the fraction, the answer is -13/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/45-7/4 30/45-14/4 30/90-7/4 30/45-7/8 90/45-7/4 30/45-21/4 30/45-7/12 30/45-35/4 30/45-7/20 30/45-49/4 30/45-7/28