Subtract 3/84 from 90/8
1st number: 11 2/8, 2nd number: 3/84
90/8 - 3/84 is 157/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 84 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
90/8 = 90 × 21/8 × 21 = 1890/168 - Likewise, for the 2nd fraction, since 84 × 2 = 168,
3/84 = 3 × 2/84 × 2 = 6/168 - Subtract the two like fractions:
1890/168 - 6/168 = 1890 - 6/168 = 1884/168 - After reducing the fraction, the answer is 157/14
- In mixed form: 113/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/8-6/84 90/16-3/84 90/8-9/84 90/24-3/84 90/8-15/84 90/40-3/84 90/8-21/84 90/56-3/84