What is 31/26 simplified?

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list