Add 20/18 and 5/40
1st number: 1 2/18, 2nd number: 5/40
20/18 + 5/40 is 89/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
20/18 = 20 × 20/18 × 20 = 400/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
5/40 = 5 × 9/40 × 9 = 45/360 - Add the two like fractions:
400/360 + 45/360 = 400 + 45/360 = 445/360 - 445/360 simplified gives 89/72
- So, 20/18 + 5/40 = 89/72
In mixed form: 117/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+5/40 20/18+10/40 20/36+5/40 20/18+5/80 60/18+5/40 20/18+15/40 20/54+5/40 20/18+25/40 20/90+5/40 20/18+35/40