We are on the river and the pot is 100bb and the board is AKQsJsTs and the villian bets, how often must we call with just the board? Are this calculations correct?

Bet 1: All In 100bb

Call= 50bb * X - (1-X) * 100=0    X=100/150=0,66 needs to bluff at least 66%

Bet 2: all in 75bb

X=75/125=0,6.    Need to bluff 60%

Bet 3:  AI 50bb

X=50/100= 50% bluff