Subtract 8/12 from 90/72
1st number: 1 18/72, 2nd number: 8/12
90/72 - 8/12 is 7/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 12 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
90/72 = 90 × 1/72 × 1 = 90/72 - Likewise, for the 2nd fraction, since 12 × 6 = 72,
8/12 = 8 × 6/12 × 6 = 48/72 - Subtract the two like fractions:
90/72 - 48/72 = 90 - 48/72 = 42/72 - After reducing the fraction, the answer is 7/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72-16/12 90/72-8/24 90/72-24/12 90/72-8/36 90/72-40/12 90/72-8/60 90/72-56/12 90/72-8/84