Add 18/30 and 1/90
18/30 + 1/90 is 11/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
18/30 = 18 × 3/30 × 3 = 54/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
1/90 = 1 × 1/90 × 1 = 1/90 - Add the two like fractions:
54/90 + 1/90 = 54 + 1/90 = 55/90 - 55/90 simplified gives 11/18
- So, 18/30 + 1/90 = 11/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30+1/90 18/30+2/90 18/60+1/90 54/30+1/90 18/30+3/90 18/90+1/90 90/30+1/90 18/30+5/90 18/30+7/90