Subtract 4/90 from 6/40
6/40 - 4/90 is 19/180.
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,
6/40 = 6 × 9/40 × 9 = 54/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
4/90 = 4 × 4/90 × 4 = 16/360 - Subtract the two like fractions:
54/360 - 16/360 = 54 - 16/360 = 38/360 - After reducing the fraction, the answer is 19/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/40-4/90 6/40-8/90 6/80-4/90 18/40-4/90 6/40-12/90 30/40-4/90 6/40-20/90 42/40-4/90 6/40-28/90