Subtract 84/90 from 1/70
1/70 - 84/90 is -193/210.
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,
1/70 = 1 × 9/70 × 9 = 9/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
84/90 = 84 × 7/90 × 7 = 588/630 - Subtract the two like fractions:
9/630 - 588/630 = 9 - 588/630 = -579/630 - After reducing the fraction, the answer is -193/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/70-84/90 3/70-84/90 5/70-84/90 7/70-84/90