Subtract 72/27 from 9/90
1st number: 9/90, 2nd number: 2 18/27
9/90 - 72/27 is -77/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 90 × 3 = 270,
9/90 = 9 × 3/90 × 3 = 27/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
72/27 = 72 × 10/27 × 10 = 720/270 - Subtract the two like fractions:
27/270 - 720/270 = 27 - 720/270 = -693/270 - After reducing the fraction, the answer is -77/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/90-72/27 9/90-72/54 27/90-72/27 9/90-72/81 45/90-72/27 63/90-72/27