Add 30/75 and 70/20
1st number: 30/75, 2nd number: 3 10/20
30/75 + 70/20 is 39/10.
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,
30/75 = 30 × 4/75 × 4 = 120/300 - Likewise, for the 2nd fraction, since 20 × 15 = 300,
70/20 = 70 × 15/20 × 15 = 1050/300 - Add the two like fractions:
120/300 + 1050/300 = 120 + 1050/300 = 1170/300 - 1170/300 simplified gives 39/10
- So, 30/75 + 70/20 = 39/10
In mixed form: 39/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/75+70/20 30/75+70/40 90/75+70/20 30/75+70/60