human
Carry out a subtraction problem with positive integers where the answer is less than 0 Tom and Katie are trying to write calculations based on the diagram below.

Tom writes: \( 15-20=-5 \)

Katie writes: \( (-5)+20=15 \)

Who is correct? ![Number line with an arrow marked -20 going from 15 to -5]() Neither is correct
gpt
Does not understand the diagram given in the question