Add 30/40 and 24/72
30/40 + 24/72 is 13/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
30/40 = 30 × 9/40 × 9 = 270/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
24/72 = 24 × 5/72 × 5 = 120/360 - Add the two like fractions:
270/360 + 120/360 = 270 + 120/360 = 390/360 - 390/360 simplified gives 13/12
- So, 30/40 + 24/72 = 13/12
In mixed form: 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40+24/72 30/40+48/72 30/80+24/72 90/40+24/72