Subtract 9/80 from 40/30
1st number: 1 10/30, 2nd number: 9/80
40/30 - 9/80 is 293/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
40/30 = 40 × 8/30 × 8 = 320/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
9/80 = 9 × 3/80 × 3 = 27/240 - Subtract the two like fractions:
320/240 - 27/240 = 320 - 27/240 = 293/240 - In mixed form: 153/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30-9/80 40/30-18/80 40/60-9/80 40/30-27/80 40/90-9/80 40/30-45/80 40/30-63/80