Question

(Epcar)Calcule a expressão. [3/4×(2-3/4)]÷[3/5×(4+1/2)]

Answer 1

Bom dia Sergio

(3/4 * (2 - 3/4))/( 3/5 * (4 + 1/2))
(3/4 * (8 - 3)/4)/( 3/5 * (8/2 + 1/2)

(3/4 * 5/4) / ( 3/5 * 9/2) 
(15/16) / (27/10) = (15/16)*(10/27) 

(15/27)*(10/16) = (5/9)*(5/8) = 25/72 

Answer 2

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