Add 40/80 and 30/45
40/80 + 30/45 is 7/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
40/80 = 40 × 9/80 × 9 = 360/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
30/45 = 30 × 16/45 × 16 = 480/720 - Add the two like fractions:
360/720 + 480/720 = 360 + 480/720 = 840/720 - 840/720 simplified gives 7/6
- So, 40/80 + 30/45 = 7/6
In mixed form: 11/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/80+60/45 40/80+30/90 40/80+90/45