Subtract 21/90 from 2/35
2/35 - 21/90 is -37/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 35 × 18 = 630,
2/35 = 2 × 18/35 × 18 = 36/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
21/90 = 21 × 7/90 × 7 = 147/630 - Subtract the two like fractions:
36/630 - 147/630 = 36 - 147/630 = -111/630 - After reducing the fraction, the answer is -37/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/35-21/90 2/35-42/90 2/70-21/90 6/35-21/90 2/35-63/90 10/35-21/90 14/35-21/90