Subtract 50/42 from 4/90
1st number: 4/90, 2nd number: 1 8/42
4/90 - 50/42 is -361/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
4/90 = 4 × 7/90 × 7 = 28/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
50/42 = 50 × 15/42 × 15 = 750/630 - Subtract the two like fractions:
28/630 - 750/630 = 28 - 750/630 = -722/630 - After reducing the fraction, the answer is -361/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90-50/42 4/90-50/84 12/90-50/42 20/90-50/42 28/90-50/42