Subtract 3/72 from 84/80
1st number: 1 4/80, 2nd number: 3/72
84/80 - 3/72 is 121/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 72 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
84/80 = 84 × 9/80 × 9 = 756/720 - Likewise, for the 2nd fraction, since 72 × 10 = 720,
3/72 = 3 × 10/72 × 10 = 30/720 - Subtract the two like fractions:
756/720 - 30/720 = 756 - 30/720 = 726/720 - After reducing the fraction, the answer is 121/120
- In mixed form: 11/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80-6/72 84/80-9/72 84/80-15/72 84/80-21/72