Question

HELP FAST!!!!!!!!

Find the percent of decrease from 280 to 210. Round to the nearest tenth of a percent if necessary.

Answer 1

`\left|\begin{array}{ccc}280&-&100\%\\210&-&p\%\end{array}\right|\ \ \ \ |cross\ multiply\\\\\\p\cdot280=210\cdot100\\280p=21000\ \ \ |divide\ both\ sides\ by\ 280\\\boxed{p=75\ (\%)}`


`Answer:\ 100\%-75\%=\boxed{25\%}`

Other solution:

`280-210=70\\\\(70)/(280)=(70:70)/(280:70)=(1)/(4)\\\\a=a\cdot100\%\to(1)/(4)=(1)/(4)\cdot100\%=(100)/(4)\%=\boxed{25\%}`