Subtract 30/40 from 8/27
8/27 - 30/40 is -49/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 40 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 27 × 40 = 1080,
8/27 = 8 × 40/27 × 40 = 320/1080 - Likewise, for the 2nd fraction, since 40 × 27 = 1080,
30/40 = 30 × 27/40 × 27 = 810/1080 - Subtract the two like fractions:
320/1080 - 810/1080 = 320 - 810/1080 = -490/1080 - After reducing the fraction, the answer is -49/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/27-30/40 8/27-60/40 8/54-30/40 8/27-30/80 24/27-30/40 8/27-90/40 8/81-30/40 40/27-30/40 56/27-30/40