Subtract 42/15 from 75/54
1st number: 1 21/54, 2nd number: 2 12/15
75/54 - 42/15 is -127/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 15 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 54 × 5 = 270,
75/54 = 75 × 5/54 × 5 = 375/270 - Likewise, for the 2nd fraction, since 15 × 18 = 270,
42/15 = 42 × 18/15 × 18 = 756/270 - Subtract the two like fractions:
375/270 - 756/270 = 375 - 756/270 = -381/270 - After reducing the fraction, the answer is -127/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/54-84/15 75/54-42/30 75/54-42/45 75/54-42/75