Subtract 9/40 from 90/10
1st number: 9 0/10, 2nd number: 9/40
90/10 - 9/40 is 351/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
90/10 = 90 × 4/10 × 4 = 360/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
9/40 = 9 × 1/40 × 1 = 9/40 - Subtract the two like fractions:
360/40 - 9/40 = 360 - 9/40 = 351/40 - In mixed form: 831/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/10-18/40 90/20-9/40 90/10-9/80 90/10-27/40 90/30-9/40 90/10-45/40 90/50-9/40 90/10-63/40 90/70-9/40