Subtract 25/9 from 42/70
1st number: 42/70, 2nd number: 2 7/9
42/70 - 25/9 is -98/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 9 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
42/70 = 42 × 9/70 × 9 = 378/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
25/9 = 25 × 70/9 × 70 = 1750/630 - Subtract the two like fractions:
378/630 - 1750/630 = 378 - 1750/630 = -1372/630 - After reducing the fraction, the answer is -98/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/70-25/9 42/70-50/9 42/70-25/18 42/70-75/9 42/70-25/27 42/70-25/45 42/70-25/63