the cost of an article is decreased by 20% if the original cost is rupees 80 find a new cost?
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Step-by-step explanation:
decrease%=20%
original \: cost \: = ₹ \: 80originalcost=₹80
\begin{gathered}decrease \: in \: cost \: = \\ decrease \: \% \: of \: original \: amount\end{gathered}decreaseincost=decrease%oforiginalamount
= \geqslant 20 \: \% \: of \: ₹ \: 80=⩾20%of₹80
= \geqslant \frac{20}{100} \times 80 = ₹ \: 16=⩾10020×80=₹16
= \geqslant decrease \: in \: cost = ₹(80 - 16)=⩾decreaseincost=₹(80−16)
= \geqslant ₹ \: 64=⩾₹64
\geqslant hence \: verified \leqslant⩾henceverified⩽
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