Add 18/90 and 4/20
18/90 + 4/20 is 2/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
18/90 = 18 × 2/90 × 2 = 36/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
4/20 = 4 × 9/20 × 9 = 36/180 - Add the two like fractions:
36/180 + 36/180 = 36 + 36/180 = 72/180 - 72/180 simplified gives 2/5
- So, 18/90 + 4/20 = 2/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/90+4/20 18/90+8/20 18/90+4/40 54/90+4/20 18/90+12/20 18/90+4/60 18/90+28/20