Add 20/42 and 90/24
1st number: 20/42, 2nd number: 3 18/24
20/42 + 90/24 is 355/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
20/42 = 20 × 4/42 × 4 = 80/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
90/24 = 90 × 7/24 × 7 = 630/168 - Add the two like fractions:
80/168 + 630/168 = 80 + 630/168 = 710/168 - 710/168 simplified gives 355/84
- So, 20/42 + 90/24 = 355/84
In mixed form: 419/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+90/24 20/84+90/24 20/42+90/48 60/42+90/24 20/42+90/72