Given:
price of oranges last week was = $1.75 per pound
price decreased = 20%
Then new price will be =(100-20)% of $1.75
= 80% of $1.75
= 80/100 × $1.75
on solving above we get:
= 0.80 × $1.75
= $ 1.40
Hence, the new prices of the Oranges is $1.40 per pound.