Add 42/20 and 28/45
1st number: 2 2/20, 2nd number: 28/45
42/20 + 28/45 is 49/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
42/20 = 42 × 9/20 × 9 = 378/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
28/45 = 28 × 4/45 × 4 = 112/180 - Add the two like fractions:
378/180 + 112/180 = 378 + 112/180 = 490/180 - 490/180 simplified gives 49/18
- So, 42/20 + 28/45 = 49/18
In mixed form: 213/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+28/45 42/20+56/45 42/40+28/45 42/20+28/90 42/20+84/45 42/60+28/45