It increased by 7.5% if you subtract the starting value from the new one and then put that answer over the starting value.
Answer:
The answer is 8/3 I think
Check the picture below.
now, to get how much is the area of the tiled section, we simply get the area of the whole pool, 53x26, which includes the tiles, and then subtract the area without the tile, the rectangle in the middle, and what's leftover, is the area of the tiled area.

Answer:
B
Step-by-step explanation:

(Subtract 2L from both sides of the equation)
(Symmetric Property of Equality)
(Divide both sides of the equation by 2)
("Split" the fractions)
(Simplify)
Hope this helps!
32*1.2=38.4 (.2 is the 20%, and the 1 adds the percent to the original cost making it a mark up)