2 years ago

Explain how you could estimate 22% of 78 to check if your answer is reasonable.

Mathematics

2 answers:

Sedbober [7]2 years ago

7 0

Answer:

Step-by-step explanation:

you could think that 22% is close to 25% , so one forth of it, 1/4

78 percent is close to 80

1/4 of 80 is 20

actually 78*22/100=17.16

matrenka [14]2 years ago

4 0

Answer:

the other person is right

Step-by-step explanation:

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klemol [59]

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2 years ago

25 is what percent of 365

kondaur [170]

$\begin{array}{ccc}365&-&100\%\\25&-&x\%\end{array}\ \ \ |cross\ multiply\ both\ sides\\\\365\cdot x=25\cdot100\\365x=2500\ \ \ \ \ |divide\ both\ sides\ by\ 365\\\\x=\frac{2500}{365}\\\\x=\frac{2500:5}{365:5}=\frac{500}{73}=\boxed{6\frac{62}{73}\ (\%)\approx7\%}$