Add 20/60 and 12/90
20/60 + 12/90 is 7/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
20/60 = 20 × 3/60 × 3 = 60/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
12/90 = 12 × 2/90 × 2 = 24/180 - Add the two like fractions:
60/180 + 24/180 = 60 + 24/180 = 84/180 - 84/180 simplified gives 7/15
- So, 20/60 + 12/90 = 7/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/60+12/90 20/60+24/90 20/60+36/90 20/60+60/90 20/60+84/90