78,80,82,84,86,87,87,89,94,95
86+87/2 = 86.5
Ryan's marbles = x
Marie has 4 times less marbles then Ryan would have if he lost 15 marbles (it means he would have x-15)
So, Marie marbles = (x-15):4
If Ryan lost 75 marbles (it means he would have x-75), he would have 1 1/2 times as many marbles as Marie.
We got an equation:
Multiply both sides by 8:

Add 600 and subtract 3x on both sides:

Divide both sides by 5:

Answer: Ryan have 111 marbles.
I believe its the third line correct me if im worng
5/5 is the same as 1 while 99/100 is only 0.99 (is less than 1).....So yes, 5/5 is greater than 99/100.