Subtract 42/90 from 7/15
7/15 - 42/90 is 0/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
7/15 = 7 × 6/15 × 6 = 42/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Subtract the two like fractions:
42/90 - 42/90 = 42 - 42/90 = 0/90 - The answer is 0
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/15-42/90 7/15-84/90 7/30-42/90 21/15-42/90 7/45-42/90 35/15-42/90 7/75-42/90 49/15-42/90