Subtract 7/81 from 18/35
18/35 - 7/81 is 1213/2835.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 81 is 2835
Next, find the equivalent fraction of both fractional numbers with denominator 2835 - For the 1st fraction, since 35 × 81 = 2835,
18/35 = 18 × 81/35 × 81 = 1458/2835 - Likewise, for the 2nd fraction, since 81 × 35 = 2835,
7/81 = 7 × 35/81 × 35 = 245/2835 - Subtract the two like fractions:
1458/2835 - 245/2835 = 1458 - 245/2835 = 1213/2835
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/35-7/81 18/35-14/81 18/70-7/81 54/35-7/81 18/35-21/81 90/35-7/81 18/35-35/81 18/35-49/81