Decrease b by 20%. how do you find it?

"Decrease b by 20%"

this can be expressed as

b minus ( 20% of b )

mathematically,

b - (20/100)b

or

(b - 0.2b)

or

(0.8b)

what is the question here

step-by-step explanation:

answer: city needs 2.4 inches of rainfall more to match the record of 40 inches.

step-by-step explanation:

since we have given that

total annual rainfall a city record = 40 inches

this year, total rainfall recorded = 37.6 inches

number of inches of rainfall   is needed to match the record of 40 inches is given by

hence, city needs 2.4 inches of rainfall more to match the record of 40 inches.