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GMAT - Problem Solving - Arithmetic

1/2+((2/3?3/8)/4)?9/16

\frac { 1 }{ 2 }  \frac { \frac { 2 }{ 3 } *\frac { 3 }{ 8 } }{ 4 } -\frac { 9 }{ 16 } =?

\frac { 1 }{ 2 } +\frac { \frac { 2 }{ 3 } *\frac { 3 }{ 8 } }{ 4 } -\frac { 9 }{ 16 } =?\\ \\ =\frac { 1 }{ 2 } +\frac { 1/4 }{ 4 } -\frac { 9 }{ 16 } \\ \\ =\frac { 1 }{ 2 } +\frac { 1 }{ 16 } -\frac { 9 }{ 16 } \\ \\ =\frac { 8+1-9 }{ 16 } =0