Subtract 70/27 from 63/42
1st number: 1 21/42, 2nd number: 2 16/27
63/42 - 70/27 is -59/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
63/42 = 63 × 9/42 × 9 = 567/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
70/27 = 70 × 14/27 × 14 = 980/378 - Subtract the two like fractions:
567/378 - 980/378 = 567 - 980/378 = -413/378 - After reducing the fraction, the answer is -59/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/84-70/27 63/42-70/54 63/42-70/81