How do you figure out what 422.80 is 40% of?

Question

I know the 40% is 422.80.  How do I find the 60% to know what the 100% amount is?

I already know that 422.80 is 40% of 1057,  but if I didn't know the 1057, how would I find out

Answer 1

422.8=0.4x

x=422.8/0.4

x=1057