by what percent is 90 smaller than 150?

Question

 by what percent is 90 smaller than 150?

Answer 1

150-x%*150=90

150-90=x%*150

60=x%*150

60/150=x%

6/15=x%

2/5=x%

2/5=4/10=40/100=x%

x=40

90 is 40% smaller than 150, or...

90/150=9/15=3/5=6/10=60/100=60%

90 is 60% of 150, therefore 90 is 40% smaller than 150