Add 81/40 and 5/12, Solve 2 1/40 + 5/12 as a fraction

Add 81/40 and 5/12

1^st number: 2 1/40, 2^nd number: 5/12

81/40 + 5/12 is 293/120.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 12 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 40 × 3 = 120,
81/40 = 81 × 3/40 × 3 = 243/120
Likewise, for the 2nd fraction, since 12 × 10 = 120,
5/12 = 5 × 10/12 × 10 = 50/120
Add the two like fractions:
243/120 + 50/120 = 243 + 50/120 = 293/120
So, 81/40 + 5/12 = 293/120
In mixed form: 253/120

MathStep (Works offline)

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