Subtract 72/10 from 18/6
1st number: 3 0/6, 2nd number: 7 2/10
18/6 - 72/10 is -21/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 6 × 5 = 30,
18/6 = 18 × 5/6 × 5 = 90/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
72/10 = 72 × 3/10 × 3 = 216/30 - Subtract the two like fractions:
90/30 - 216/30 = 90 - 216/30 = -126/30 - After reducing the fraction, the answer is -21/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/6-72/10 18/12-72/10 18/6-72/20 54/6-72/10 18/6-72/30 90/6-72/10 18/30-72/10 18/6-72/50 18/42-72/10 18/6-72/70