Subtract 90/84 from 50/42
1st number: 1 8/42, 2nd number: 1 6/84
50/42 - 90/84 is 5/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
50/42 = 50 × 2/42 × 2 = 100/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
90/84 = 90 × 1/84 × 1 = 90/84 - Subtract the two like fractions:
100/84 - 90/84 = 100 - 90/84 = 10/84 - After reducing the fraction, the answer is 5/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/84-90/84