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Decrease 20 in the ratio4 to 5

Sagot :

Answer:

16

Step-by-step explanation:

decreasing 20 in the ratio 4 : 5 , indicates

new quantity : old quantity = 4 : 5

let the new quantity be x, then by proportion

[tex]\frac{x}{20}[/tex] = [tex]\frac{4}{5}[/tex] ( cross multiply )

5x = 20 × 4 = 80 ( divide both sides by 5 )

x = 16

Thus 20 decreased in the ratio 4 : 5 is 16

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