Subtract 6/80 from 90/42
1st number: 2 6/42, 2nd number: 6/80
90/42 - 6/80 is 579/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
90/42 = 90 × 40/42 × 40 = 3600/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
6/80 = 6 × 21/80 × 21 = 126/1680 - Subtract the two like fractions:
3600/1680 - 126/1680 = 3600 - 126/1680 = 3474/1680 - After reducing the fraction, the answer is 579/280
- In mixed form: 219/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42-12/80 90/84-6/80 90/42-18/80 90/42-30/80 90/42-42/80