If there are 125 girls, and the ratio is boys to girls, then you can divide 125 by 5 to get the multiplication factor. This would be 25. Now you can multiply 25 by 4 to get how many boys were in the gym, which would be 100. To get back to your original ratio, you can divide 100/125 by 25 on top and bottom to get 4:5, or 4/5. :)
If the lowest temp. is 60 degrees the highest temp i would think would be i don't know maybe 80 or 70 degrees i don't know though might be wrong sorry if you get it wrong
