VCS C++ Programming

This is my code for my drive and it is c++ in vcs. I’m not familiar with c++ but how would i set the power or speed of the motors to be slower because i’ve tried different ways but it hasn’t worked

I’m assuming the 4 lines of code is within “int main(){}” as well as within a “while(1==1){}” loop.
This sets the max to be 80% motor power:

        LD1.spin(vex::directionType::fwd, ( Controller1.Axis3.value() )*0.8, vex::velocityUnits::pct);
        LD2.spin(vex::directionType::fwd, ( Controller1.Axis3.value() )*0.8, vex::velocityUnits::pct);
        RD1.spin(vex::directionType::fwd, ( Controller1.Axis2.value() )*0.8, vex::velocityUnits::pct);
        RD2.spin(vex::directionType::fwd, ( Controller1.Axis2.value() )*0.8, vex::velocityUnits::pct);