Subtract 90/54 from 5/42
1st number: 5/42, 2nd number: 1 36/54
5/42 - 90/54 is -65/42.
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,
5/42 = 5 × 9/42 × 9 = 45/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
90/54 = 90 × 7/54 × 7 = 630/378 - Subtract the two like fractions:
45/378 - 630/378 = 45 - 630/378 = -585/378 - After reducing the fraction, the answer is -65/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/42-90/54 5/84-90/54 15/42-90/54 25/42-90/54 35/42-90/54