Subtract 84/18 from 25/7
1st number: 3 4/7, 2nd number: 4 12/18
25/7 - 84/18 is -23/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
25/7 = 25 × 18/7 × 18 = 450/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
84/18 = 84 × 7/18 × 7 = 588/126 - Subtract the two like fractions:
450/126 - 588/126 = 450 - 588/126 = -138/126 - After reducing the fraction, the answer is -23/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/7-84/18 25/14-84/18 25/7-84/36 75/7-84/18 25/21-84/18 25/7-84/54 25/35-84/18 25/7-84/90 25/49-84/18