Subtract 7/42 from 9/10
9/10 - 7/42 is 11/15.
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,
9/10 = 9 × 21/10 × 21 = 189/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
7/42 = 7 × 5/42 × 5 = 35/210 - Subtract the two like fractions:
189/210 - 35/210 = 189 - 35/210 = 154/210 - After reducing the fraction, the answer is 11/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/10-7/42 9/10-14/42 9/20-7/42 9/10-7/84 27/10-7/42 9/10-21/42 9/30-7/42 45/10-7/42 9/10-35/42 9/50-7/42 63/10-7/42 9/10-49/42 9/70-7/42