Question

What number should added 6 3/5 to get 15?​

Answer 1

6 ⅗ = 33/5

33/5 + x = 15

15 - 33/5 = x

75/3 - 33/5 = x (LCM)

42/5 = x

42/5 answer

Answer 2

Solution

The unknown value be 'x'.

$\implies6 \frac{3}{5} + x = 15$

$\implies \: x = 15 - 6 \frac{3}{5}$

$\implies \: x = 15 - \frac{33}{5}$

LCM=5

$\implies \: x = \frac{75}{5} - \frac{33}{5}$

$\implies \: x = \frac{75 - 33}{5}$

$\implies \: x = \frac{42}{5}$

Hope it helps you...