It is 10/40 = 1/4 in its simplest form
31/40
4/40 = 1/10 in simplest form.
40over 50in simplest form is 4/5
Dividing both by 10, you get 4/5 which is in its simplest form.
32/40 = 4/5
40/90 = 4/9
-40/90 = -4/9
4/40 simplifies to 1/10 (or .1)
40/150 = 4/15
4/5
3/4