Add 45/75 and 63/20
1st number: 45/75, 2nd number: 3 3/20
45/75 + 63/20 is 15/4.
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,
63/20 = 63 × 15/20 × 15 = 945/300 - Add the two like fractions:
180/300 + 945/300 = 180 + 945/300 = 1125/300 - 1125/300 simplified gives 15/4
- So, 45/75 + 63/20 = 15/4
In mixed form: 33/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/75+63/20 45/75+63/40 45/75+63/60