Subtract 4/10 from 2/90
2/90 - 4/10 is -17/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
2/90 = 2 × 1/90 × 1 = 2/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
4/10 = 4 × 9/10 × 9 = 36/90 - Subtract the two like fractions:
2/90 - 36/90 = 2 - 36/90 = -34/90 - After reducing the fraction, the answer is -17/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/90-4/10 2/90-8/10 2/90-4/20 6/90-4/10 2/90-12/10 2/90-4/30 10/90-4/10 2/90-20/10 2/90-4/50 14/90-4/10 2/90-28/10 2/90-4/70