Add 18/40 and 20/48
18/40 + 20/48 is 13/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 48 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 40 × 6 = 240,
18/40 = 18 × 6/40 × 6 = 108/240 - Likewise, for the 2nd fraction, since 48 × 5 = 240,
20/48 = 20 × 5/48 × 5 = 100/240 - Add the two like fractions:
108/240 + 100/240 = 108 + 100/240 = 208/240 - 208/240 simplified gives 13/15
- So, 18/40 + 20/48 = 13/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40+20/48 18/40+40/48 18/80+20/48 18/40+20/96 54/40+20/48 18/40+60/48 90/40+20/48