If someone could emplain hoe to do these?!?!

cvandoren

New member
Joined
Nov 14, 2005
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19
Tim is 100% older then his sister, but in 8 years he will be only 20% older. How old is tim and his sister now?



99 girls and 1 boy are in a school.(99% of school are girls.) How many girls lead the school if the percent of girls becomes 98%. (no more boys may enter the school)


If you could please me!!! THANK YOU!
I have no clue were to start and dont get it at all
 
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