Subtract 42/4 from 7/90
1st number: 7/90, 2nd number: 10 2/4
7/90 - 42/4 is -469/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 4 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
7/90 = 7 × 2/90 × 2 = 14/180 - Likewise, for the 2nd fraction, since 4 × 45 = 180,
42/4 = 42 × 45/4 × 45 = 1890/180 - Subtract the two like fractions:
14/180 - 1890/180 = 14 - 1890/180 = -1876/180 - After reducing the fraction, the answer is -469/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90-42/4 7/90-84/4 7/90-42/8 21/90-42/4 7/90-42/12 35/90-42/4 7/90-42/20 49/90-42/4 7/90-42/28