Add 40/48 and 72/90
40/48 + 72/90 is 49/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 48 × 15 = 720,
40/48 = 40 × 15/48 × 15 = 600/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
72/90 = 72 × 8/90 × 8 = 576/720 - Add the two like fractions:
600/720 + 576/720 = 600 + 576/720 = 1176/720 - 1176/720 simplified gives 49/30
- So, 40/48 + 72/90 = 49/30
In mixed form: 119/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/48+72/90 40/96+72/90