Subtract 70/54 from 30/63
1st number: 30/63, 2nd number: 1 16/54
30/63 - 70/54 is -155/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 63 × 6 = 378,
30/63 = 30 × 6/63 × 6 = 180/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
70/54 = 70 × 7/54 × 7 = 490/378 - Subtract the two like fractions:
180/378 - 490/378 = 180 - 490/378 = -310/378 - After reducing the fraction, the answer is -155/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/63-70/54 90/63-70/54