Subtract 10/42 from 49/90
49/90 - 10/42 is 193/630.
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,
49/90 = 49 × 7/90 × 7 = 343/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
10/42 = 10 × 15/42 × 15 = 150/630 - Subtract the two like fractions:
343/630 - 150/630 = 343 - 150/630 = 193/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/90-10/42 49/90-20/42 49/90-10/84 49/90-30/42 49/90-50/42 49/90-70/42