Add 6/4 and 90/42, Solve 1 2/4 + 2 6/42 as a fraction

Add 6/4 and 90/42

1^st number: 1 2/4, 2^nd number: 2 6/42

6/4 + 90/42 is 51/14.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 42 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 4 × 21 = 84,
6/4 = 6 × 21/4 × 21 = 126/84
Likewise, for the 2nd fraction, since 42 × 2 = 84,
90/42 = 90 × 2/42 × 2 = 180/84
Add the two like fractions:
126/84 + 180/84 = 126 + 180/84 = 306/84
306/84 simplified gives 51/14
So, 6/4 + 90/42 = 51/14
In mixed form: 39/14

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad