Subtract 27/70 from 5/90
5/90 - 27/70 is -104/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
5/90 = 5 × 7/90 × 7 = 35/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
27/70 = 27 × 9/70 × 9 = 243/630 - Subtract the two like fractions:
35/630 - 243/630 = 35 - 243/630 = -208/630 - After reducing the fraction, the answer is -104/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/90-27/70 5/90-54/70 15/90-27/70 5/90-81/70 25/90-27/70 35/90-27/70