Add 70/80 and 9/15
70/80 + 9/15 is 59/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 15 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
70/80 = 70 × 3/80 × 3 = 210/240 - Likewise, for the 2nd fraction, since 15 × 16 = 240,
9/15 = 9 × 16/15 × 16 = 144/240 - Add the two like fractions:
210/240 + 144/240 = 210 + 144/240 = 354/240 - 354/240 simplified gives 59/40
- So, 70/80 + 9/15 = 59/40
In mixed form: 119/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/80+18/15 70/80+9/30 70/80+27/15 70/80+9/45 70/80+45/15 70/80+9/75 70/80+63/15