Subtract 20/9 from 40/70
1st number: 40/70, 2nd number: 2 2/9
40/70 - 20/9 is -104/63.
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,
40/70 = 40 × 9/70 × 9 = 360/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
20/9 = 20 × 70/9 × 70 = 1400/630 - Subtract the two like fractions:
360/630 - 1400/630 = 360 - 1400/630 = -1040/630 - After reducing the fraction, the answer is -104/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/70-20/9 40/70-40/9 40/70-20/18 40/70-60/9 40/70-20/27 40/70-20/45 40/70-20/63