Subtract 90/80 from 42/6
1st number: 7 0/6, 2nd number: 1 10/80
42/6 - 90/80 is 47/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 6 × 40 = 240,
42/6 = 42 × 40/6 × 40 = 1680/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
90/80 = 90 × 3/80 × 3 = 270/240 - Subtract the two like fractions:
1680/240 - 270/240 = 1680 - 270/240 = 1410/240 - After reducing the fraction, the answer is 47/8
- In mixed form: 57/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/6-90/80 42/12-90/80 42/18-90/80 42/30-90/80