Respuesta :

200 ÷ 10 = 20 × 5 = 100
200 ÷ 40 = 5 × 8 = 40
Number of small fish  = (200 / 10) * 5 =  20*5 = 100

Number of large fish = (200 / 40) * 8 =  5*8 = 40

Total number of fish  = 140  

Ratio small to large fish  = 40:100 =   2:5.