Show How You Would Mentally Compute the Exact Results $\frac { 3 } { 7 } + \frac { 7 } { 8 } + \frac { 4 } { 7 } + \frac { 1 } { 4 }$

Essay

Show how you would mentally compute the exact results. Explain your thinking.
A) $\frac { 3 } { 7 } + \frac { 7 } { 8 } + \frac { 4 } { 7 } + \frac { 1 } { 4 }$

B) $\frac { 1 } { 7 } + \frac { 3 } { 10 } + \frac { 4 } { 7 } + \frac { 7 } { 10 }$

C) $\frac { 18 } { 24 } \times \frac { 80 } { 2 } \times \frac { 21 } { 42 } \times$ 100% = ___

D) 114 - 24 $\frac { 3 } { 8 }$ = ___