Subtract 35/90 from 3/70
3/70 - 35/90 is -109/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
3/70 = 3 × 9/70 × 9 = 27/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
35/90 = 35 × 7/90 × 7 = 245/630 - Subtract the two like fractions:
27/630 - 245/630 = 27 - 245/630 = -218/630 - After reducing the fraction, the answer is -109/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/70-35/90 3/70-70/90 9/70-35/90 15/70-35/90 21/70-35/90