Add 18/42 and 90/30
1st number: 18/42, 2nd number: 3 0/30
18/42 + 90/30 is 24/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
18/42 = 18 × 5/42 × 5 = 90/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
90/30 = 90 × 7/30 × 7 = 630/210 - Add the two like fractions:
90/210 + 630/210 = 90 + 630/210 = 720/210 - 720/210 simplified gives 24/7
- So, 18/42 + 90/30 = 24/7
In mixed form: 33/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/42+90/30 18/84+90/30 18/42+90/60 54/42+90/30 90/42+90/30