Add 90/40 and 12/20
1st number: 2 10/40, 2nd number: 12/20
90/40 + 12/20 is 57/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
90/40 = 90 × 1/40 × 1 = 90/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
12/20 = 12 × 2/20 × 2 = 24/40 - Add the two like fractions:
90/40 + 24/40 = 90 + 24/40 = 114/40 - 114/40 simplified gives 57/20
- So, 90/40 + 12/20 = 57/20
In mixed form: 217/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40+24/20 90/80+12/20 90/40+12/40 90/40+36/20 90/40+12/60 90/40+60/20 90/40+84/20