Subtract 70/9 from 42/63
1st number: 42/63, 2nd number: 7 7/9
42/63 - 70/9 is -64/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
42/63 = 42 × 1/63 × 1 = 42/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
70/9 = 70 × 7/9 × 7 = 490/63 - Subtract the two like fractions:
42/63 - 490/63 = 42 - 490/63 = -448/63 - After reducing the fraction, the answer is -64/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63-70/9 42/63-70/18 42/63-70/27 42/63-70/45 42/63-70/63