Subtract 28/42 from 72/10
1st number: 7 2/10, 2nd number: 28/42
72/10 - 28/42 is 98/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
72/10 = 72 × 21/10 × 21 = 1512/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
28/42 = 28 × 5/42 × 5 = 140/210 - Subtract the two like fractions:
1512/210 - 140/210 = 1512 - 140/210 = 1372/210 - After reducing the fraction, the answer is 98/15
- In mixed form: 68/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/10-56/42 72/20-28/42 72/10-28/84 72/10-84/42 72/30-28/42 72/50-28/42 72/70-28/42