By what percent must we decrease the number A to obtain the number 4A/5?

1 answer:

8 0

$\bf \cfrac{4A}{5}\implies \cfrac{4}{5}\cdot A\impliedby \textit{A is being reduced to four fifths} \\\\\\ \stackrel{\textit{let's convert four fifths to percentage}}{\cfrac{4}{5}\cdot 100\implies \cfrac{400}{5}\implies 80}$

so 4/5 of A is really 80% of A then.

since a whole A is 100% of A, 100% - 80% = 20%, A is being reduced by 20%, namely 1/5.

You might be interested in

When a sound wave uncounters a barrier, what happens?

motikmotik

A. The sound reflects I believe is the answer

8 0

4 years ago

The boys mixed 10 gallons of the 20% pure lemon juice and 10 gallons of the 70% pure lemon juice mix, because they wanted 20 gal

mars1129 [50]

The boys should use 140% of pure lemon juice mi to get <span>a final mixture of 20 gallons at 40% lemon juice:

if 20:70 the 40:70 - it is more like ration and proportion.

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
</span>

6 0

3 years ago

In the diagram below, ΔPQR ≅ ΔSTR. Complete the statement RQ⎯⎯⎯⎯⎯⎯⎯⎯≅ R Q ¯ ≅ ___

pantera1 [17]

Based on the CPCTC theorem, the complete statement is: RQ ≅ RT.

<h3>What is the CPCTC Theorem?</h3>

According to the CPCTC theorem, if two triangles are said to be congruent, then all the corresponding parts of both triangles are congruent.

Given that ΔPQR ≅ ΔSTR, RQ corresponds to RT. Therefore, both sides are congruent to each other.

Thus, the complete statement is: RQ ≅ RT.

Learn more about the CPCTC theorem on:

brainly.com/question/14706064

#SPJ1