1,3+2%×2per5-1 3per8

1,3 + 2% × 2/5 - 1 ⅜

= 13/10 + (2/100 × 2/5) - 11/8
= 52/40 + 4/500 - 55/40
= 1.300/1000 + 8/1000 - 1.375/1000
= -67/1000
= -0,067

semoga membantu !)