Subtract 80/90 from 10/35
10/35 - 80/90 is -38/63.
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,
10/35 = 10 × 18/35 × 18 = 180/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
80/90 = 80 × 7/90 × 7 = 560/630 - Subtract the two like fractions:
180/630 - 560/630 = 180 - 560/630 = -380/630 - After reducing the fraction, the answer is -38/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/35-80/90 10/70-80/90 30/35-80/90 50/35-80/90 70/35-80/90