Question

(12,15+3/40):(102/50-0,0025)

Answer 1

(12,15+3/40): (102/50-0,0025)
(12,15+0,075): (2,04-0,0025)
12,225:2.0375=6

Answer 2

convertendo as frações para decimais temos;

3/40=0,075
102/50=2,04
 agora  vamos resolver
(12,15+0,075):(2,04-0,0025)]                             
12,225: 2.0375= 6