Hi! HELP!!!!

Please help me see what is wrong here.
Kid 1: Kitchen knifes are 75% off their original price. If the original price is $50.25, what is the price now?
Kid 2: Seth, the answer is $3.768 because 75% off the original price ($50.25) in fraction form is 3/4, and ¾ x 50.24 = 3.768

I need to fix Kid 2s mistake. I don't understand what he did wring. Maybe he put the decimal in the wrong place? I'm not sure.
PLEASE HELP ME ASAP!
Bye!
MERCI

The DECIMAL PLACE!!! Thank y'all SOOOO MUCH! Thank you Writeacher and Reiny! Bye!

When mixing fractions with decimals in calculations, errors often occur.

Your error is the placement of decimals
75% of $50.25
= (3/4)($50.25)
= $34.69 , you have to round to the nearest cent.

So what is the price if we take $34.69 away from $50.25 ?

Quick Way: take (.25)(50.25)

$15.56?

Use www.wolframalpha.com to check your work.

PS — $15.56 is incorrect.

Ok! Thanks!

$37.69? I ALSO need to know how HE got his answer. This makes no sense! How did HE get HIS answer? :(

If you used Wolframalpha correctly, it tells you how the answer was calculated. If you didn't … <sigh>

Go to wolframalpha.com and enter what Reiny told you:
(.25)(50.25)

Do you know why he wrote (.25) <~~?

Oops sorry I entered the wrong thing….. one sec…… and no, I don't know why he wrote (.25) <~~?

If something is being sold for 75% off, doesn't that mean you are paying 25%? And isn't 25% the same as .25 for calculations?

Ooooooooooooh! NOW this makes sense. But…….. How did Kid 2 get 3.768?