Subtract 80/42 from 27/30
1st number: 27/30, 2nd number: 1 38/42
27/30 - 80/42 is -211/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
27/30 = 27 × 7/30 × 7 = 189/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
80/42 = 80 × 5/42 × 5 = 400/210 - Subtract the two like fractions:
189/210 - 400/210 = 189 - 400/210 = -211/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30-80/42 27/60-80/42 27/30-80/84 81/30-80/42 27/90-80/42