Subtract 5/42 from 6/90
6/90 - 5/42 is -11/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
6/90 = 6 × 7/90 × 7 = 42/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
5/42 = 5 × 15/42 × 15 = 75/630 - Subtract the two like fractions:
42/630 - 75/630 = 42 - 75/630 = -33/630 - After reducing the fraction, the answer is -11/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/90-5/42 6/90-10/42 6/90-5/84 18/90-5/42 6/90-15/42 30/90-5/42 6/90-25/42 42/90-5/42 6/90-35/42