Subtract 90/20 from 2/9
1st number: 2/9, 2nd number: 4 10/20
2/9 - 90/20 is -77/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
2/9 = 2 × 20/9 × 20 = 40/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
90/20 = 90 × 9/20 × 9 = 810/180 - Subtract the two like fractions:
40/180 - 810/180 = 40 - 810/180 = -770/180 - After reducing the fraction, the answer is -77/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/9-90/20 2/18-90/20 2/9-90/40 6/9-90/20 2/27-90/20 2/9-90/60 10/9-90/20 2/45-90/20 14/9-90/20 2/63-90/20