The amount below, showing the change measured in feet in water level over four months. What is the average monthly change in water level?
2/5,-4/5, 9/5, 1/5
To find the average monthly change in water level, we first need to find the total change over the four months:
(2/5) + (-4/5) + (9/5) + (1/5)
Now, let's add these fractions together:
(2/5) - (4/5) + (9/5) + (1/5)
= (2 - 4 + 9 + 1)/5
= (8)/5
= 8/5
So, the total change in water level over four months is 8/5 feet.
To find the average monthly change in water level, we divide this total change by the number of months:
(8/5) / 4
= (8/5) * (1/4)
= 8/20
= 2/5
Therefore, the average monthly change in water level is 2/5 feet.