Subtract 27/30 from 90/42
1st number: 2 6/42, 2nd number: 27/30
90/42 - 27/30 is 87/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
90/42 = 90 × 5/42 × 5 = 450/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
27/30 = 27 × 7/30 × 7 = 189/210 - Subtract the two like fractions:
450/210 - 189/210 = 450 - 189/210 = 261/210 - After reducing the fraction, the answer is 87/70
- In mixed form: 117/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42-54/30 90/84-27/30 90/42-27/60 90/42-81/30 90/42-27/90