Add 10/80 and 9/30
10/80 + 9/30 is 17/40.
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,
10/80 = 10 × 3/80 × 3 = 30/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
9/30 = 9 × 8/30 × 8 = 72/240 - Add the two like fractions:
30/240 + 72/240 = 30 + 72/240 = 102/240 - 102/240 simplified gives 17/40
- So, 10/80 + 9/30 = 17/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/80+9/30 10/80+18/30 10/80+9/60 30/80+9/30 10/80+27/30 10/80+9/90 50/80+9/30 10/80+45/30 70/80+9/30 10/80+63/30