Subtract 90/60 from 7/90
1st number: 7/90, 2nd number: 1 30/60
7/90 - 90/60 is -64/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 60 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 60 × 3 = 180,
90/60 = 90 × 3/60 × 3 = 270/180 - Subtract the two like fractions:
14/180 - 270/180 = 14 - 270/180 = -256/180 - After reducing the fraction, the answer is -64/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90-90/60 21/90-90/60 35/90-90/60 49/90-90/60