Question

help me please its urgent.. and answer is - 1600/ 189​

Answer 1

A basic property we must know before solving this problem is

$(x/y)^{-n}$ = $(y/x)^{n}$

Let the required number be $x$

According to condition of the problem

$(-3/8)^{-2}$ ÷ $x$ = (-21/25)

that means,

$(-3/8)^{-2}$ = (-21/25)×$x$

$x$ = $(-3/8)^{-2}$ × (-25/21)

  = $(-8/3)^{2}$×$(-25/21)$

  = $(64/9)$×$(-25/21)$

  = $\frac{-64*25}{9*21}$

$x$ = $\frac{-1600}{189}$

HOPE IT HELPS !!

Answer 2

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