Add 25/80 and 40/18, Solve 25/80 + 2 4/18 as a fraction

Add 25/80 and 40/18

1^st number: 25/80, 2^nd number: 2 4/18

25/80 + 40/18 is 365/144.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 18 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 80 × 9 = 720,
25/80 = 25 × 9/80 × 9 = 225/720
Likewise, for the 2nd fraction, since 18 × 40 = 720,
40/18 = 40 × 40/18 × 40 = 1600/720
Add the two like fractions:
225/720 + 1600/720 = 225 + 1600/720 = 1825/720
1825/720 simplified gives 365/144
So, 25/80 + 40/18 = 365/144
In mixed form: 277/144

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad