Subtract 18/72 from 7/35
7/35 - 18/72 is -1/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 35 × 72 = 2520,
7/35 = 7 × 72/35 × 72 = 504/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
18/72 = 18 × 35/72 × 35 = 630/2520 - Subtract the two like fractions:
504/2520 - 630/2520 = 504 - 630/2520 = -126/2520 - After reducing the fraction, the answer is -1/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/35-18/72 7/35-36/72 7/70-18/72 21/35-18/72 7/35-54/72 7/35-90/72 49/35-18/72