Subtract 40/70 from 8/9
8/9 - 40/70 is 20/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 9 × 70 = 630,
8/9 = 8 × 70/9 × 70 = 560/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
40/70 = 40 × 9/70 × 9 = 360/630 - Subtract the two like fractions:
560/630 - 360/630 = 560 - 360/630 = 200/630 - After reducing the fraction, the answer is 20/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/9-40/70 8/9-80/70 8/18-40/70 24/9-40/70 8/27-40/70 40/9-40/70 8/45-40/70 56/9-40/70 8/63-40/70