Subtract 75/54 from 21/35
1st number: 21/35, 2nd number: 1 21/54
21/35 - 75/54 is -71/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 54 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 35 × 54 = 1890,
21/35 = 21 × 54/35 × 54 = 1134/1890 - Likewise, for the 2nd fraction, since 54 × 35 = 1890,
75/54 = 75 × 35/54 × 35 = 2625/1890 - Subtract the two like fractions:
1134/1890 - 2625/1890 = 1134 - 2625/1890 = -1491/1890 - After reducing the fraction, the answer is -71/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/35-75/54 21/70-75/54 63/35-75/54