Subtract 81/7 from 18/60
1st number: 18/60, 2nd number: 11 4/7
18/60 - 81/7 is -789/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 7 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
18/60 = 18 × 7/60 × 7 = 126/420 - Likewise, for the 2nd fraction, since 7 × 60 = 420,
81/7 = 81 × 60/7 × 60 = 4860/420 - Subtract the two like fractions:
126/420 - 4860/420 = 126 - 4860/420 = -4734/420 - After reducing the fraction, the answer is -789/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/60-81/7 18/60-81/14 54/60-81/7 18/60-81/21 90/60-81/7 18/60-81/35 18/60-81/49