Let x be the old price
X= 1200$
The price decreased 20% after 1 year to become price y :
Y= 0.8x
= 0.8 (1200)
= 960$
In the year after y also decreased 20% to be price y’:
Y’= 0.8y
= 0.8 (960)
= 768 $
The price y’ then decreased 20% to become price y’’:
Y’’ = 0.8 y’
= 0.8 (768)
= 614.4 $
Then the price will be 614.4 $ after 3 years
137,638
+52,091
-------
189,729 ⇨ 189,730
Just do like this
.836
.83
.83=.830
which one has bigger numbers?
.836 or
.830
the answer is .836
There are 25 students in the class
