Subtract 2/90 from 2/42
2/42 - 2/90 is 8/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
2/42 = 2 × 15/42 × 15 = 30/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
2/90 = 2 × 7/90 × 7 = 14/630 - Subtract the two like fractions:
30/630 - 14/630 = 30 - 14/630 = 16/630 - After reducing the fraction, the answer is 8/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/42-2/90 2/42-4/90 2/84-2/90 6/42-2/90 2/42-6/90 10/42-2/90 2/42-10/90 14/42-2/90 2/42-14/90