Add 30/80 and 9/30
30/80 + 9/30 is 27/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
30/80 = 30 × 3/80 × 3 = 90/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
9/30 = 9 × 8/30 × 8 = 72/240 - Add the two like fractions:
90/240 + 72/240 = 90 + 72/240 = 162/240 - 162/240 simplified gives 27/40
- So, 30/80 + 9/30 = 27/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80+9/30 30/80+18/30 30/80+9/60 90/80+9/30 30/80+27/30 30/80+9/90 30/80+45/30 30/80+63/30