Add 20/5 and 18/40
1st number: 4 0/5, 2nd number: 18/40
20/5 + 18/40 is 89/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,
20/5 = 20 × 8/5 × 8 = 160/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
18/40 = 18 × 1/40 × 1 = 18/40 - Add the two like fractions:
160/40 + 18/40 = 160 + 18/40 = 178/40 - 178/40 simplified gives 89/20
- So, 20/5 + 18/40 = 89/20
In mixed form: 49/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5+18/40 20/5+36/40 20/10+18/40 20/5+18/80 60/5+18/40 20/5+54/40 20/15+18/40 20/5+90/40 20/25+18/40 20/35+18/40