Subtract 9/42 from 10/15
10/15 - 9/42 is 19/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
10/15 = 10 × 14/15 × 14 = 140/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
9/42 = 9 × 5/42 × 5 = 45/210 - Subtract the two like fractions:
140/210 - 45/210 = 140 - 45/210 = 95/210 - After reducing the fraction, the answer is 19/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15-9/42 10/15-18/42 10/30-9/42 10/15-9/84 30/15-9/42 10/15-27/42 10/45-9/42 50/15-9/42 10/15-45/42 10/75-9/42 70/15-9/42 10/15-63/42