Question

2/5=2/10+k so at this equation what does k=?

Answer 1

K + 2/10 = 2/5

K = -2/10 + 2/5

K = -2/10 + 4/10

K = 2/10

K = 1/5

Answer 2

$\frac{2}{5}= \frac{2}{10}+k$ ⇒ $\frac{2}{5}= \frac{2\div2}{10\div2}+k$

$\frac{2}{5}= \frac{1}{5}+k$ ⇒ $k= \frac{2}{5}- \frac{1}{5}$

$\boxed { k= \frac{1}{5} }$