Add 18/32 and 21/20
1st number: 18/32, 2nd number: 1 1/20
18/32 + 21/20 is 129/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 20 is 160
Next, find the equivalent fraction of both fractional numbers with denominator 160 - For the 1st fraction, since 32 × 5 = 160,
18/32 = 18 × 5/32 × 5 = 90/160 - Likewise, for the 2nd fraction, since 20 × 8 = 160,
21/20 = 21 × 8/20 × 8 = 168/160 - Add the two like fractions:
90/160 + 168/160 = 90 + 168/160 = 258/160 - 258/160 simplified gives 129/80
- So, 18/32 + 21/20 = 129/80
In mixed form: 149/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/32+21/20 18/32+42/20 18/64+21/20 18/32+21/40 54/32+21/20 18/32+63/20 18/96+21/20 18/32+21/60 90/32+21/20