Subtract 8/42 from 9/15
9/15 - 8/42 is 43/105.
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,
9/15 = 9 × 14/15 × 14 = 126/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
8/42 = 8 × 5/42 × 5 = 40/210 - Subtract the two like fractions:
126/210 - 40/210 = 126 - 40/210 = 86/210 - After reducing the fraction, the answer is 43/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15-8/42 9/15-16/42 9/30-8/42 9/15-8/84 27/15-8/42 9/15-24/42 9/45-8/42 45/15-8/42 9/15-40/42 9/75-8/42 63/15-8/42 9/15-56/42