Subtract 72/10 from 27/90
1st number: 27/90, 2nd number: 7 2/10
27/90 - 72/10 is -69/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
27/90 = 27 × 1/90 × 1 = 27/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
72/10 = 72 × 9/10 × 9 = 648/90 - Subtract the two like fractions:
27/90 - 648/90 = 27 - 648/90 = -621/90 - After reducing the fraction, the answer is -69/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/90-72/10 27/90-72/20 81/90-72/10 27/90-72/30 27/90-72/50 27/90-72/70