Question

18karat gold is a mixture of gold and another metal . 18 out of 24 parts are pure gold. Express the pure gold as a percentage of the total.

Answer 1

Answer:

75%.

Step-by-step explanation:

In 18 karat gold,

18 out of 24 parts are pure gold.

Therefore percentage of pure gold in the mixture is,

(18/24) ×100%=75%.

Answer 2

18karat gold is a mixture of gold and another metal . 18 out of 24 parts are pure gold. Express the pure gold as a percentage of the total.

solution : Karat is a unit used to measure the purity of gold. 100% pure gold means 24K.

here, 18K gold is a mixture of gold and another metal. it means, 18 out of 24 parts are pure gold.

so, pure gold as a percentage of the total = gold part in mixture/total × 100

= 18k/24k × 100

= 300/4

= 75%

hence, 75% pure gold contains in mixture.