Subtract 7/42 from 7/10
7/10 - 7/42 is 8/15.
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,
7/10 = 7 × 21/10 × 21 = 147/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
7/42 = 7 × 5/42 × 5 = 35/210 - Subtract the two like fractions:
147/210 - 35/210 = 147 - 35/210 = 112/210 - After reducing the fraction, the answer is 8/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/10-7/42 7/10-14/42 7/20-7/42 7/10-7/84 21/10-7/42 7/10-21/42 7/30-7/42 35/10-7/42 7/10-35/42 7/50-7/42 49/10-7/42 7/10-49/42 7/70-7/42