Add 18/16 and 72/20
1st number: 1 2/16, 2nd number: 3 12/20
18/16 + 72/20 is 189/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
18/16 = 18 × 5/16 × 5 = 90/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
72/20 = 72 × 4/20 × 4 = 288/80 - Add the two like fractions:
90/80 + 288/80 = 90 + 288/80 = 378/80 - 378/80 simplified gives 189/40
- So, 18/16 + 72/20 = 189/40
In mixed form: 429/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/16+72/20 18/32+72/20 18/16+72/40 54/16+72/20 18/48+72/20 18/16+72/60 90/16+72/20 18/80+72/20