SOLUTION: Jerry finds that he lacks 75ft. of wire to complete a job. He gets a partly used spool of wire from the shop. The spool originally contained 1000ft. of wire, but 1/5 of it ha

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Question 949393: Jerry finds that he lacks 75ft. of wire to complete a job. He gets a partly used spool of wire from the shop. The spool originally contained 1000ft. of wire, but 1/5 of it had been used. If the electrician took 75ft. of this partly used spool, what percent of the wire from the partly used spool did he use?
Answer by Theo(13342) About Me  (Show Source):
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he needs 75 feet of wire.

he gets a partly used spool of wire from the shop.

the spool originally contained 1000 feet of wire, but 1/5 of it had been used.

1/5 of 1000 = 200 which means that 800 feet remained.

he takes 75 feet away from 800 feet.

75/800 = .09375 = 9.375%

he used 9.375% of the partly used spool of wire.