Subtract 90/40 from 84/9
1st number: 9 3/9, 2nd number: 2 10/40
84/9 - 90/40 is 85/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 9 × 40 = 360,
84/9 = 84 × 40/9 × 40 = 3360/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
90/40 = 90 × 9/40 × 9 = 810/360 - Subtract the two like fractions:
3360/360 - 810/360 = 3360 - 810/360 = 2550/360 - After reducing the fraction, the answer is 85/12
- In mixed form: 71/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18-90/40 84/9-90/80 84/27-90/40 84/45-90/40 84/63-90/40