Subtract 27/40 from 4/90
4/90 - 27/40 is -227/360.
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,
4/90 = 4 × 4/90 × 4 = 16/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
27/40 = 27 × 9/40 × 9 = 243/360 - Subtract the two like fractions:
16/360 - 243/360 = 16 - 243/360 = -227/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90-27/40 4/90-54/40 4/90-27/80 12/90-27/40 4/90-81/40 20/90-27/40 28/90-27/40