What percentage of his power did MSSJ Goku use initially against Cell?

[Hector]

Yaay, I love candies.

 

[SSJ2]

25%.

 

[SIAD]

32%

 

[Hector]

Ok, who voted for 'more than 50%' and why?

 

[Zippy]

33.33333333333%

 

[Papasmurf]

He didn't do a visible power up and his eyes didn't turn focused until he decided to go full power, definitely a much lower percentage than that 50% display.

 

[Let's Go Fearless!]

That was just an exercise for Goku and Cell. I don't think they used a lot of effort on that one. Somewhere around 20% at least.