NOTE: 2 people has taught me how to calculate pot odds and outs in 2 different ways. which is right?

METHOD 1
lets say i have 15 outs after flop. 15/47=32%
one other person is left, and he bets $4 making it $14.
this makes it 4:14, which equals 1:3.5, which equals 1/4.5, which is 22%
32% to 22%. I will call.

METHOD 2
lets say i have 15 outs after flop. 15:47, which is equal to 1:3.133, which is 1/4.133, equals around 24%
one other person is left, and he bets $4 making it $14.
this makes it 4:14, which equals 1:3.5, which equals 1/4.5, which is 22%
24% to 22%. I will call

WHY IS IT DIFFERENT PERCENTAGES IF ITS SUPPOSED TO BE THE SAME?