Subtract 9/40 from 30/10
1st number: 3 0/10, 2nd number: 9/40
30/10 - 9/40 is 111/40.
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,
30/10 = 30 × 4/10 × 4 = 120/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
9/40 = 9 × 1/40 × 1 = 9/40 - Subtract the two like fractions:
120/40 - 9/40 = 120 - 9/40 = 111/40 - In mixed form: 231/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/10-9/40 30/10-18/40 30/20-9/40 30/10-9/80 90/10-9/40 30/10-27/40 30/10-45/40 30/50-9/40 30/10-63/40 30/70-9/40