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