[R] R: How to multiplying y-axis ticks value by 100?

[iPad]

R: how multiplying y-axis ticks value by 100 (without put the % symbol next to the number) here: 
plot (CI.overall, curvlab=c("Discharge", "Death"), xlab="Days", las=1) 
P.S. So instead 0.00, 0.20 etc. the 0, 20 etc.
Thank you in advance, Nic

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