Add 12/45 and 10/20
12/45 + 10/20 is 23/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
12/45 = 12 × 4/45 × 4 = 48/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
10/20 = 10 × 9/20 × 9 = 90/180 - Add the two like fractions:
48/180 + 90/180 = 48 + 90/180 = 138/180 - 138/180 simplified gives 23/30
- So, 12/45 + 10/20 = 23/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/45+10/20 12/90+10/20 12/45+10/40 36/45+10/20 12/45+30/20 12/45+10/60 60/45+10/20 12/45+50/20 84/45+10/20 12/45+70/20