Add 36/84 and 90/80, Solve 36/84 + 1 10/80 as a fraction

Add 36/84 and 90/80

1^st number: 36/84, 2^nd number: 1 10/80

36/84 + 90/80 is 87/56.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 80 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 84 × 20 = 1680,
36/84 = 36 × 20/84 × 20 = 720/1680
Likewise, for the 2nd fraction, since 80 × 21 = 1680,
90/80 = 90 × 21/80 × 21 = 1890/1680
Add the two like fractions:
720/1680 + 1890/1680 = 720 + 1890/1680 = 2610/1680
2610/1680 simplified gives 87/56
So, 36/84 + 90/80 = 87/56
In mixed form: 131/56

MathStep (Works offline)

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