Subtract 70/42 from 70/54
1st number: 1 16/54, 2nd number: 1 28/42
70/54 - 70/42 is -10/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
70/54 = 70 × 7/54 × 7 = 490/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
70/42 = 70 × 9/42 × 9 = 630/378 - Subtract the two like fractions:
490/378 - 630/378 = 490 - 630/378 = -140/378 - After reducing the fraction, the answer is -10/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/54-70/84