Add 18/72 and 75/40
1st number: 18/72, 2nd number: 1 35/40
18/72 + 75/40 is 17/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
18/72 = 18 × 5/72 × 5 = 90/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
75/40 = 75 × 9/40 × 9 = 675/360 - Add the two like fractions:
90/360 + 675/360 = 90 + 675/360 = 765/360 - 765/360 simplified gives 17/8
- So, 18/72 + 75/40 = 17/8
In mixed form: 21/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/72+75/40 18/72+75/80 54/72+75/40 90/72+75/40