Add 42/40 and 28/90
1st number: 1 2/40, 2nd number: 28/90
42/40 + 28/90 is 49/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
42/40 = 42 × 9/40 × 9 = 378/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
28/90 = 28 × 4/90 × 4 = 112/360 - Add the two like fractions:
378/360 + 112/360 = 378 + 112/360 = 490/360 - 490/360 simplified gives 49/36
- So, 42/40 + 28/90 = 49/36
In mixed form: 113/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40+28/90 42/40+56/90 42/80+28/90 42/40+84/90