Add 84/40 and 18/72
1st number: 2 4/40, 2nd number: 18/72
84/40 + 18/72 is 47/20.
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,
84/40 = 84 × 9/40 × 9 = 756/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
18/72 = 18 × 5/72 × 5 = 90/360 - Add the two like fractions:
756/360 + 90/360 = 756 + 90/360 = 846/360 - 846/360 simplified gives 47/20
- So, 84/40 + 18/72 = 47/20
In mixed form: 27/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40+36/72 84/80+18/72 84/40+54/72 84/40+90/72