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mamaluj [8]
3 years ago
9

Create a proportion using the form %/100 = is/of = to represent the following word problem. 78% of what number is 42?

Mathematics
2 answers:
Aliun [14]3 years ago
6 0

Answer:

.78 x = 42

x = 42 / .78

The number is 53.8461538462


Step-by-step explanation:


Gala2k [10]3 years ago
3 0

Answer:

x\approx 53.85

Step-by-step explanation:

If 78% of x (some number) is equal to 42, then We must set this as an equation to find it.

1) Rewriting 78% as a fraction. And considering that when We say 78% of some number (x) we mean a product.

78\%=\frac{78}{100}\Rightarrow \frac{78}{100}x=42

2) Then we can go on:

100*\frac{78}{100}x= 42*100\\\\78x=4200\\ \\\frac{78x}{78}=\frac{4200}{78}\Rightarrow x\approx 53.85\\

3) Alternatively, simply dividing 42 by 0.78 (78%) would come to the same result:

\frac{42}{0.78}\approx 53.85

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If he = 7x -27 find the value of x
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Step-by-step explanation:

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1                     {}                          80%

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5                     {}                          40%

6                     {}                          100%

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8                     {}                          100%

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10                     {}                          80%

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