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patriot [66]
3 years ago
8

in the central city grand prix out of 30 cars that started the race,12 of them finished. what percent of the cars finished the r

ace? what percent did not finished the race?
Mathematics
2 answers:
xxMikexx [17]3 years ago
7 0
Subtract 12 from 30 so that you know how many DID NOT finish. 30-12=18. 
12/30 finished. Divide 12 by 30. 12÷30=0.4, and multiply by 100%. 0.4x100=40, so
40% finished.

18/30 did not finish. Divide 18 by 30.  18÷30=0.6, and multiply by 100%. 0.6x100=60, so
60% did not finish.
olga_2 [115]3 years ago
3 0
To get the answer we can use proportion.
30 ------------- 100%
12 --------------x
crossmultiply now
30x=12*100%
30x=1200%      /:30 (divide both sides by 30)
x=40% - its the percentage of cars which finished the race.
100%-40%=60% - its the answer
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