Roxanne has 1/2 as many beads as Sherie.
The number of beads Sherie has is 4/5 that of
Trevor’s. Trevor has 165 beads.
How many more beads does Trevor have than Roxanne?
R = Roxanne's beads
S = Sherie's beads
T = Trevor 's beads
T = 165
S = 4 / 5 T
S = 4 • 165 / 5 = 660 / 5 = 132
R = S / 2 = 132 / 2 = 66
T - R = 165 - 66 = 99