Add 45/75 and 12/20
45/75 + 12/20 is 6/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 20 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 75 × 4 = 300,
45/75 = 45 × 4/75 × 4 = 180/300 - Likewise, for the 2nd fraction, since 20 × 15 = 300,
12/20 = 12 × 15/20 × 15 = 180/300 - Add the two like fractions:
180/300 + 180/300 = 180 + 180/300 = 360/300 - 360/300 simplified gives 6/5
- So, 45/75 + 12/20 = 6/5
In mixed form: 11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/75+12/20 45/75+24/20 45/75+12/40 45/75+36/20 45/75+12/60 45/75+60/20 45/75+84/20