Subtract 7/90 from 8/45
8/45 - 7/90 is 1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
8/45 = 8 × 2/45 × 2 = 16/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
7/90 = 7 × 1/90 × 1 = 7/90 - Subtract the two like fractions:
16/90 - 7/90 = 16 - 7/90 = 9/90 - After reducing the fraction, the answer is 1/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/45-7/90 8/45-14/90 8/90-7/90 24/45-7/90 8/45-21/90 40/45-7/90 8/45-35/90 56/45-7/90 8/45-49/90