Subtract 90/9 from 84/63
1st number: 1 21/63, 2nd number: 10 0/9
84/63 - 90/9 is -26/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
84/63 = 84 × 1/63 × 1 = 84/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
90/9 = 90 × 7/9 × 7 = 630/63 - Subtract the two like fractions:
84/63 - 630/63 = 84 - 630/63 = -546/63 - After reducing the fraction, the answer is -26/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63-90/18 84/63-90/27 84/63-90/45 84/63-90/63