He would have to work about 6 days. Or 5.6837061
The expression that allows us conclude parts of congruent triangles are congruent to each other is corresponding parts of Congruent Triangles are congruent
<h3>What are congruent triangles?</h3>
A triangle is a three-sided polygon with three edges and three vertices. the sum of angles in a triangle is 180 degrees. Two triangles are congruent when they have exactly the same three sides and exactly the same three angles.
To learn more about triangles, please check: brainly.com/question/22949981
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Answer: 83.33% decrease
<u>Step-by-step explanation:</u>
=
= -0.8333
= -83.33%