The expression is 250 of 7000.
The percent is 2.5 and the whole is 7000. You need to find the part.
\Let n represent the part.
\Part = percentwhole
n = 2.57000 (Substitute percent = 2.5 and whole = 7000)
n = 17500 (Multiply: )
17500 is 250 of 7000.