The fraction 13/40 cannot be reduced any more.
The reduced fraction for 40 over 100 is 2/5
The reduced fraction for 40 over 64 is 5/8
21/40 cannot be reduced.
it can be reduced to 4 over 3
13/21 can't be reduced.
2/13 is in reduced form
No.
6/13 is in lowest terms and can't be reduced.
nope
1 over 8
189 and 40 have no factor in common and so the fraction cannot be reduced.
no 3 does not go (evenly) into 40