Subtract 40/9 from 30/80
1st number: 30/80, 2nd number: 4 4/9
30/80 - 40/9 is -293/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
30/80 = 30 × 9/80 × 9 = 270/720 - Likewise, for the 2nd fraction, since 9 × 80 = 720,
40/9 = 40 × 80/9 × 80 = 3200/720 - Subtract the two like fractions:
270/720 - 3200/720 = 270 - 3200/720 = -2930/720 - After reducing the fraction, the answer is -293/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80-40/9 30/80-80/9 30/80-40/18 90/80-40/9 30/80-40/27 30/80-40/45 30/80-40/63