Subtract 84/64 from 5/7
1st number: 5/7, 2nd number: 1 20/64
5/7 - 84/64 is -67/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 64 is 448
Next, find the equivalent fraction of both fractional numbers with denominator 448 - For the 1st fraction, since 7 × 64 = 448,
5/7 = 5 × 64/7 × 64 = 320/448 - Likewise, for the 2nd fraction, since 64 × 7 = 448,
84/64 = 84 × 7/64 × 7 = 588/448 - Subtract the two like fractions:
320/448 - 588/448 = 320 - 588/448 = -268/448 - After reducing the fraction, the answer is -67/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7-84/64 5/14-84/64 15/7-84/64 5/21-84/64 25/7-84/64 5/35-84/64 35/7-84/64 5/49-84/64