Question

a=2/4 b=4/10 then a×b-a​

Answer 1

a=2/4 b=4/10

a×f-a

$\frac{2}{4} \times \frac{4}{10} - \frac{2}{4} \\ = \frac{8}{40} - \frac{2}{4} \\ = \frac{8 - 20}{40} = \frac{ - 12}{40}$

Answer 2

IF...

$a = \frac{2}{4} = \frac{1}{2}$

$b = \frac{4}{10} = \frac{2}{5}$

THEN...

$a \times b - a$

$= \frac{1}{2} \times \frac{2}{5} - \frac{1}{2}$

$= \frac{1}{5} - \frac{1}{2}$

$= \frac{(2 - 5)}{10}$

$= \frac{ - 3}{10}$

$= - 0.3$

Answer___

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