Subtract 8/42 from 90/35
1st number: 2 20/35, 2nd number: 8/42
90/35 - 8/42 is 50/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 35 × 6 = 210,
90/35 = 90 × 6/35 × 6 = 540/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
8/42 = 8 × 5/42 × 5 = 40/210 - Subtract the two like fractions:
540/210 - 40/210 = 540 - 40/210 = 500/210 - After reducing the fraction, the answer is 50/21
- In mixed form: 28/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/35-16/42 90/70-8/42 90/35-8/84 90/35-24/42 90/35-40/42 90/35-56/42