Simplify 7 5/8-5/4

Show workings bit by bit

7 5/8-5/4

= (7*4 + 5)/8 - 5/4
= (28 + 5)/8 - 5/4
= 33/8 - 5/4
= (33 - 5)/8
= 28/8
= 3 1/2

AAAaannndd the bot gets it wrong yet again!

7 5/8-5/4 = 6 13/8 - 10/8 = 6 3/8