54 - 13 = 41
54 - 38 = 16
54 - 2 = 52
-18 - 54 = -72
The percentage of girls started at 77% and dropped to 54% with no boys leaving. As the total number of students was 100, 54% means there are 54 girls still there. As 77 minus 54 is 23, that is how many girls left. N=23.
t2 - 59t + 54 - 82t2 + 60t = - 81t2 + t + 54
-1-54 = -55
6278
1,718 minus 23 is 1,695.
23
-24
It is 54/23.