Subtract 18/45 from 12/7
1st number: 1 5/7, 2nd number: 18/45
12/7 - 18/45 is 46/35.
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,
12/7 = 12 × 45/7 × 45 = 540/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
18/45 = 18 × 7/45 × 7 = 126/315 - Subtract the two like fractions:
540/315 - 126/315 = 540 - 126/315 = 414/315 - After reducing the fraction, the answer is 46/35
- In mixed form: 111/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7-18/45 12/7-36/45 12/14-18/45 12/7-18/90 36/7-18/45 12/7-54/45 12/21-18/45 60/7-18/45 12/7-90/45 12/35-18/45 84/7-18/45 12/49-18/45