Add 25/40 and 8/18
25/40 + 8/18 is 77/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
25/40 = 25 × 9/40 × 9 = 225/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
8/18 = 8 × 20/18 × 20 = 160/360 - Add the two like fractions:
225/360 + 160/360 = 225 + 160/360 = 385/360 - 385/360 simplified gives 77/72
- So, 25/40 + 8/18 = 77/72
In mixed form: 15/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/40+8/18 25/40+16/18 25/80+8/18 25/40+8/36 75/40+8/18 25/40+24/18 25/40+8/54 25/40+40/18 25/40+8/90 25/40+56/18