Answer:
40 Kg
Step-by-step explanation:
A decrease in the ratio of 5 : 8 , means
new quantity : old quantity = 5 : 8
let the new quantity be x , then
x : 64 = 5 : 8 ( express in fractional form )
[tex]\frac{x}{64}[/tex] = [tex]\frac{5}{8}[/tex] ( cross multiply )
8x = 64 × 5 = 320 ( divide both sides by 8 )
x = 40
the new quantity is then 40 Kg
