Add 42/75 and 3/20
42/75 + 3/20 is 71/100.
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,
42/75 = 42 × 4/75 × 4 = 168/300 - Likewise, for the 2nd fraction, since 20 × 15 = 300,
3/20 = 3 × 15/20 × 15 = 45/300 - Add the two like fractions:
168/300 + 45/300 = 168 + 45/300 = 213/300 - 213/300 simplified gives 71/100
- So, 42/75 + 3/20 = 71/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/75+3/20 42/75+6/20 42/75+3/40 42/75+9/20 42/75+3/60 42/75+15/20 42/75+21/20