Add 81/4 and 5/10, Solve 20 1/4 + 5/10 as a fraction

Add 81/4 and 5/10

1^st number: 20 1/4, 2^nd number: 5/10

81/4 + 5/10 is 83/4.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 10 is 20

Next, find the equivalent fraction of both fractional numbers with denominator 20
For the 1st fraction, since 4 × 5 = 20,
81/4 = 81 × 5/4 × 5 = 405/20
Likewise, for the 2nd fraction, since 10 × 2 = 20,
5/10 = 5 × 2/10 × 2 = 10/20
Add the two like fractions:
405/20 + 10/20 = 405 + 10/20 = 415/20
415/20 simplified gives 83/4
So, 81/4 + 5/10 = 83/4
In mixed form: 203/4

MathStep (Works offline)

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