Subtract 7/30 from 6/90
6/90 - 7/30 is -1/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
6/90 = 6 × 1/90 × 1 = 6/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
7/30 = 7 × 3/30 × 3 = 21/90 - Subtract the two like fractions:
6/90 - 21/90 = 6 - 21/90 = -15/90 - After reducing the fraction, the answer is -1/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/90-7/30 6/90-14/30 6/90-7/60 18/90-7/30 6/90-21/30 6/90-7/90 30/90-7/30 6/90-35/30 42/90-7/30 6/90-49/30