Subtract 72/90 from 1/3
1/3 - 72/90 is -7/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 3 × 30 = 90,
1/3 = 1 × 30/3 × 30 = 30/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
72/90 = 72 × 1/90 × 1 = 72/90 - Subtract the two like fractions:
30/90 - 72/90 = 30 - 72/90 = -42/90 - After reducing the fraction, the answer is -7/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/3-72/90 1/6-72/90 1/9-72/90 5/3-72/90 1/15-72/90 7/3-72/90 1/21-72/90