Subtract 90/10 from 9/42
1st number: 9/42, 2nd number: 9 0/10
9/42 - 90/10 is -123/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
9/42 = 9 × 5/42 × 5 = 45/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
90/10 = 90 × 21/10 × 21 = 1890/210 - Subtract the two like fractions:
45/210 - 1890/210 = 45 - 1890/210 = -1845/210 - After reducing the fraction, the answer is -123/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42-90/10 9/84-90/10 9/42-90/20 27/42-90/10 9/42-90/30 45/42-90/10 9/42-90/50 63/42-90/10 9/42-90/70