#### Answer

350

#### Work Step by Step

85% of what number is 297.5 ?
85% $\times$ x = 297.5 Translate to an equation
0.85 $\times$ x =297.5 Write 85% as 0.85
$\frac{0.85x}{0.85}$=$\frac{297.5}{0.85}$ Divide both sides by 0.85
x=$\frac{29750}{85}$
x=350
Check
85% $\times$ x = 297.5
85% $\times$ 350= 297.5
0.85$\times$ 350=297.5
297.5=297.5