3 13/25+4,12=......

88/25+4,12=
88/25×4/4=352/100=3,52
jadi, 3,52+4,12=7,64

3 13/25 = 88/25
4 , 12 = 412/100 : 2/2 = 206/50 : 2/2 = 103/25

Jadi :
= 3 13/25 + 4 , 12
= 88/25 + 103/25
= 191/25
= 7 16/25.
= 7,64