Subtract 40/30 from 8/72
1st number: 8/72, 2nd number: 1 10/30
8/72 - 40/30 is -11/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 30 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
8/72 = 8 × 5/72 × 5 = 40/360 - Likewise, for the 2nd fraction, since 30 × 12 = 360,
40/30 = 40 × 12/30 × 12 = 480/360 - Subtract the two like fractions:
40/360 - 480/360 = 40 - 480/360 = -440/360 - After reducing the fraction, the answer is -11/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/72-40/30 8/72-80/30 8/72-40/60 24/72-40/30 8/72-40/90 40/72-40/30 56/72-40/30