One hundred forty countries participated in the 1984 summer olympics in los angeles. this was 75% more than the number of countries that took part in the summer olympics on moscow 4 years earlier. how many countries participated in the 1980 olympics in moscow?

80 countries participated in the 1980 olympics in Moscow.

Step-by-step explanation:

Hello, I think I can help you with this

You can solve this by using a simple rule of three

Step 1

define

140 countries participated in 1984,this was 75% more than the last time,this means that 140 is the 175% of a value that we need to know

if

140 ⇔175%

x?    ⇔100%

the relation is

Step 2

solve for x

80 countries participated in the 1980 olympics in Moscow.

Have a nice day

its a straight line parallel to the time axis