Subtract 1/54 from 90/42
1st number: 2 6/42, 2nd number: 1/54
90/42 - 1/54 is 803/378.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
90/42 = 90 × 9/42 × 9 = 810/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
1/54 = 1 × 7/54 × 7 = 7/378 - Subtract the two like fractions:
810/378 - 7/378 = 810 - 7/378 = 803/378 - In mixed form: 247/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42-2/54 90/84-1/54 90/42-3/54 90/42-5/54 90/42-7/54