Subtract 75/45 from 18/7
1st number: 2 4/7, 2nd number: 1 30/45
18/7 - 75/45 is 19/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
18/7 = 18 × 45/7 × 45 = 810/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
75/45 = 75 × 7/45 × 7 = 525/315 - Subtract the two like fractions:
810/315 - 525/315 = 810 - 525/315 = 285/315 - After reducing the fraction, the answer is 19/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/7-75/45 18/14-75/45 18/7-75/90 54/7-75/45 18/21-75/45 90/7-75/45 18/35-75/45 18/49-75/45