Add 90/20 and 25/12
1st number: 4 10/20, 2nd number: 2 1/12
90/20 + 25/12 is 79/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
90/20 = 90 × 3/20 × 3 = 270/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
25/12 = 25 × 5/12 × 5 = 125/60 - Add the two like fractions:
270/60 + 125/60 = 270 + 125/60 = 395/60 - 395/60 simplified gives 79/12
- So, 90/20 + 25/12 = 79/12
In mixed form: 67/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+50/12 90/40+25/12 90/20+25/24 90/20+75/12 90/60+25/12 90/20+25/36 90/20+25/60 90/20+25/84