(5-3x12/(5x5+15)+(3x0+40))x(5x5x3/15)

$$\\ \left[
5-{3\times12\over(5\times5+15)}
+(3\times0+40)
\right]
\times(5\times5
\times{3\over15}
)\\\\
=(5-{36\over40}+40})\times(5\times {15\over15})\\\\
=(45-{9\over10}})\times5\\\\
=45\times5-{45\over10}}\\\\
=225-4.5\\\\
=220.5$$