Add 20/45 and 40/8
1st number: 20/45, 2nd number: 5 0/8
20/45 + 40/8 is 49/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
20/45 = 20 × 8/45 × 8 = 160/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
40/8 = 40 × 45/8 × 45 = 1800/360 - Add the two like fractions:
160/360 + 1800/360 = 160 + 1800/360 = 1960/360 - 1960/360 simplified gives 49/9
- So, 20/45 + 40/8 = 49/9
In mixed form: 54/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45+40/8 20/45+80/8 20/90+40/8 20/45+40/16 60/45+40/8 20/45+40/24 20/45+40/56