Subtract 42/40 from 4/27
1st number: 4/27, 2nd number: 1 2/40
4/27 - 42/40 is -487/540.
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,
4/27 = 4 × 40/27 × 40 = 160/1080 - Likewise, for the 2nd fraction, since 40 × 27 = 1080,
42/40 = 42 × 27/40 × 27 = 1134/1080 - Subtract the two like fractions:
160/1080 - 1134/1080 = 160 - 1134/1080 = -974/1080 - After reducing the fraction, the answer is -487/540
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/27-42/40 4/27-84/40 4/54-42/40 4/27-42/80 12/27-42/40 4/81-42/40 20/27-42/40 28/27-42/40