Subtract 90/40 from 2/18
1st number: 2/18, 2nd number: 2 10/40
2/18 - 90/40 is -77/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
2/18 = 2 × 20/18 × 20 = 40/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
90/40 = 90 × 9/40 × 9 = 810/360 - Subtract the two like fractions:
40/360 - 810/360 = 40 - 810/360 = -770/360 - After reducing the fraction, the answer is -77/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/18-90/40 2/36-90/40 2/18-90/80 6/18-90/40 2/54-90/40 10/18-90/40 2/90-90/40 14/18-90/40