What number do we need to divide $2$ $2$ by to get $90$ $90$ as our solution?

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Answer 1 · 2018-01-27T23:58:24

Let say that $a$ $a$ is the number we are looking then

$\frac{2}{a} = 90$ $2/a=90$

Hence

$a \cdot \frac{2}{a} = a \cdot 90$ $a*2/a=a*90$

$2 = 90 \cdot a$ $2=90*a$

$a = \frac{2}{90}$ $a=2/90$

So we verify that our result is the correct one

$\frac{2}{\frac{2}{90}} = \frac{90 \cdot 2}{2} = 90$ $2/(2/90)=(90*2)/2=90$

Answer 2 · 2018-01-27T23:59:08

Call the number we want to find ' $x$ $x$ ', then:

$\frac{2}{x} = 90$ $2/x=90$

Multiply both sides by $x$ $x$ , then divide both sides by $90$ $90$ , and we have:

$x = \frac{2}{90} = \frac{1}{45} ≅ 0.0222$ $x=2/90=1/45~=0.0222$

What number do we need to divide 22 by to get 9090 as our solution?