Subtract 16/81 from 9/7
1st number: 1 2/7, 2nd number: 16/81
9/7 - 16/81 is 617/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
9/7 = 9 × 81/7 × 81 = 729/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
16/81 = 16 × 7/81 × 7 = 112/567 - Subtract the two like fractions:
729/567 - 112/567 = 729 - 112/567 = 617/567 - In mixed form: 150/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/7-16/81 9/7-32/81 9/14-16/81 27/7-16/81 9/7-48/81 9/21-16/81 45/7-16/81 9/7-80/81 9/35-16/81 63/7-16/81 9/49-16/81