A100-pound watermelon is out in the sun. 99% of the watermelon's weight is water. after a few hours, 98% of the watermelon's weight is water. how many pounds of water have evaporated?

100 lbs = 1 lb of melon 99 lb water

Let "x" be weight of water:

percentage = weight of water / (1 lb melon + water)  
.98 = x / (1 lb melon + x)
.98 = x / 1 +x
.98 + .98x = x
.98 = .02x
x = 49

49 lbs of water
1 lb melon + 49 lbs water = 50 lbs total

49 / 50 = 98%
Therefore, 50 POUNDS of water evaporated

One unique triangle, because those angles add up to 180, and that's how many degrees there are in one triangle.

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.