Subtract 8/90 from 28/35
28/35 - 8/90 is 32/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 35 × 18 = 630,
28/35 = 28 × 18/35 × 18 = 504/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
8/90 = 8 × 7/90 × 7 = 56/630 - Subtract the two like fractions:
504/630 - 56/630 = 504 - 56/630 = 448/630 - After reducing the fraction, the answer is 32/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/35-8/90 28/35-16/90 28/70-8/90 84/35-8/90 28/35-24/90 28/35-40/90 28/35-56/90