Add 90/8 and 30/18
1st number: 11 2/8, 2nd number: 1 12/18
90/8 + 30/18 is 155/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
90/8 = 90 × 9/8 × 9 = 810/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
30/18 = 30 × 4/18 × 4 = 120/72 - Add the two like fractions:
810/72 + 120/72 = 810 + 120/72 = 930/72 - 930/72 simplified gives 155/12
- So, 90/8 + 30/18 = 155/12
In mixed form: 1211/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/8+60/18 90/16+30/18 90/8+30/36 90/8+90/18 90/24+30/18 90/8+30/54 90/40+30/18 90/8+30/90 90/56+30/18