Subtract 90/72 from 10/84
1st number: 10/84, 2nd number: 1 18/72
10/84 - 90/72 is -95/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 84 × 6 = 504,
10/84 = 10 × 6/84 × 6 = 60/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
90/72 = 90 × 7/72 × 7 = 630/504 - Subtract the two like fractions:
60/504 - 630/504 = 60 - 630/504 = -570/504 - After reducing the fraction, the answer is -95/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/84-90/72 30/84-90/72 50/84-90/72 70/84-90/72