I feel so embarrassed... use to do geom/trig on the fly now I can't do simple 5th grade arithmetic. Trying to figure out:

% - %

Into:

% - %

Into (where does the 25 come from? I see 1 was taken away from the 8, please explain)

% - % =

Converting to decimal it's:

0.0825 -0.0540 = 0.0285 or simplified... I gave up.