Subtract 84/9 from 45/7
1st number: 6 3/7, 2nd number: 9 3/9
45/7 - 84/9 is -61/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
45/7 = 45 × 9/7 × 9 = 405/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
84/9 = 84 × 7/9 × 7 = 588/63 - Subtract the two like fractions:
405/63 - 588/63 = 405 - 588/63 = -183/63 - After reducing the fraction, the answer is -61/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7-84/9 45/14-84/9 45/7-84/18 45/21-84/9 45/7-84/27 45/35-84/9 45/7-84/45 45/49-84/9 45/7-84/63