SOLUTION: In a school out of 300 student 70% are girl and 30%are boys if 30 girl leave and no new boy is admitted what is the new % of girl in the school?

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Question 939806: In a school out of 300 student 70% are girl and 30%are boys if 30 girl leave and no new boy is admitted what is the new % of girl in the school?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+.7%2A300+=+210+ girls in the school
+.3%2A300+=+90+ boys in the school
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+30+ girls leave, so there are now
+210+-+30+=+180+ girls, and
+90+ boys
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The fraction of girls is now:
+180%2F%28+180+%2B+90+%29+=+180%2F270+
+180%2F270+=+2%2F3+
and
+%282%2F3%29%2A100+=+66.667+
The new % of girls is 66 and 2/3 %