Question

At the Science Museum there is an energy exhibition with 150 displays:

• 30% of the displays are about electricity

•
2
5
 are about using renewable energy

• 0.2 are about the use of gas

• the remainder are about nuclear power

How many displays are there about nuclear power?

Answer 1

There should be 50 displays about nuclear power
30% of 150 is 45
45+25=70
.2% or 20% of 150 is 30
70+30=100 
So there are 50 left over which are the nuclear powers