Add 63/3 and 3/80, Solve 21 0/3 + 3/80 as a fraction

Add 63/3 and 3/80

1^st number: 21 0/3, 2^nd number: 3/80

63/3 + 3/80 is 1683/80.

Find the least common denominator or LCM of the two denominators:
LCM of 3 and 80 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 3 × 80 = 240,
63/3 = 63 × 80/3 × 80 = 5040/240
Likewise, for the 2nd fraction, since 80 × 3 = 240,
3/80 = 3 × 3/80 × 3 = 9/240
Add the two like fractions:
5040/240 + 9/240 = 5040 + 9/240 = 5049/240
5049/240 simplified gives 1683/80
So, 63/3 + 3/80 = 1683/80
In mixed form: 213/80

MathStep (Works offline)

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