Subtract 3/40 from 2/90
2/90 - 3/40 is -19/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
2/90 = 2 × 4/90 × 4 = 8/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
3/40 = 3 × 9/40 × 9 = 27/360 - Subtract the two like fractions:
8/360 - 27/360 = 8 - 27/360 = -19/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/90-3/40 2/90-6/40 2/90-3/80 6/90-3/40 2/90-9/40 10/90-3/40 2/90-15/40 14/90-3/40 2/90-21/40