What is 20% of 90 with the work?
What you want to do is convert 20% into a decimal. Then you multiply that by 90. So, if 20% was a decimal(In this case it is 0.2) you do 0.2*90 which equals 18. So the answer is 18.
the easy way is:covert 20% as a fraction20/100=x/90 and solve it. the answer is.... 18
