No.
22/66 = 1/3
66/78 = 11/13
No.
66/78 = 11/13 = 22/26
8/13 can't be reduced.
66% of 13= 66% * 13= 0.66 * 13= 8.58
39/66 both numerator and denominator are multiples of 3'3' So cancel down by '3' 39/66 = 13/ 22 This will not cancel down any further as '13' is a prime number, and '22' is NOT a multiple of 13.
11/13
1/13
66% of 13= 66% * 13= 0.66 * 13= 8.58
it is 66 over 13
it does not reduce down at all