#2**+2 **

I agree with Guest's answer, but I wanted to show the work translating the sentence to an equation.

What percent of 8 is 1,280?

So, **what percent** for **x**, **of **for ***(multiply)**, **8** for **8**, **is** for **=(equals)**, **1280** for **1280**

x * 8 = 1280

8x = 1280

\(\frac{8x}{8}=\frac{1280}{8}\)

x=160

x=160 * 100 = **16,000% D **(multiply by 100 to turn into a percent)

Check answer:

16,000% * 8 = 1,280 (divide by 100 to turn into a decimal)

160 * 8 = 1280

https://i.pinimg.com/736x/e7/f9/3e/e7f93eef91df7a14f8501895f30ba3ee--math-graphic-organizers-teaching-ideas.jpg

apostos1
Jun 21, 2018

#4**+1 **

The question is asking us to find a percentage, when multiplied by 8 equals 1280.

So, we can do: \(\frac{x}{100}*8=1280\longrightarrow \frac{8x}{100}=1280\).

Taking 100 to the other side, we have:\(8x=1280*100\longrightarrow 8x=128000\)

Finishing this equation off, we get \(\frac{128000}{8}=\boxed{16,000}\)percent.

tertre
Jun 21, 2018