Subtract 70/54 from 16/42
1st number: 16/42, 2nd number: 1 16/54
16/42 - 70/54 is -173/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
16/42 = 16 × 9/42 × 9 = 144/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
70/54 = 70 × 7/54 × 7 = 490/378 - Subtract the two like fractions:
144/378 - 490/378 = 144 - 490/378 = -346/378 - After reducing the fraction, the answer is -173/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/42-70/54 16/84-70/54 48/42-70/54 80/42-70/54