Question

the depth of a river changes by 7/10 foot on Friday , 7/8 foot on Saturday and -11/15 on sunday. on which day does the river depth decrease the most

Answer 1

The river depth decrease the most on Sunday

Explanation:

By solving the fractions

Friday = 7/10 = 0.7

Saturday = 7/8 = 0.87

Sunday = -11/15 = -0.73

So as we see the Sunday value is negative and it is least as compared to others so this is the most decreased depth.

Answer 2

Answer is on Sunday the river depth decreases the most.

Explanation:

Given that the depth of river changes

It is not given increase or decrease

But by convention, normally if positive sign for change means increase and negative sign means decrease.

Since Friday and Saturday show change by positive values namely 7/10 and 7/8 feet. we can say that change is increase

But On Sunday, the change is negative =-11/15

This implies 11/15 feet decreases

Hence this is the highest of all the three

Answer is on Sunday the river depth decreases the most.

(Because it is the only day where decrease takes place)