Subtract 25/9 from 81/4
1st number: 20 1/4, 2nd number: 2 7/9
81/4 - 25/9 is 629/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 4 × 9 = 36,
81/4 = 81 × 9/4 × 9 = 729/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
25/9 = 25 × 4/9 × 4 = 100/36 - Subtract the two like fractions:
729/36 - 100/36 = 729 - 100/36 = 629/36 - In mixed form: 1717/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/4-50/9 81/8-25/9 81/4-25/18 81/4-75/9 81/12-25/9 81/4-25/27 81/20-25/9 81/4-25/45 81/28-25/9 81/4-25/63