Question

9 is what percent of 20?

Answer 1

So percent means parts out of 100 so
1%=1/100

so 9/20=x/100
a hack withought using legit math is
20 times 5=100 so
9/20 times 5/5=x/100
9 times 5=45
20 times 5=100
45/100
45% is the answer