Subtract 72/63 from 9/70
1st number: 9/70, 2nd number: 1 9/63
9/70 - 72/63 is -71/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
9/70 = 9 × 9/70 × 9 = 81/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
72/63 = 72 × 10/63 × 10 = 720/630 - Subtract the two like fractions:
81/630 - 720/630 = 81 - 720/630 = -639/630 - After reducing the fraction, the answer is -71/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/70-72/63 27/70-72/63 45/70-72/63 63/70-72/63