Stata统计分析的代码问题

如何把这段Stata代码中增加和减少的单位从10%修改为20%？

//10%
//So that we can convert the regression coefficients to difference in bmi z-score with 10% higher/lower, we need to find 'k'
//k=(1+r)/(1-s)
//r=0.10 if using 10% change
//s=r*(sleep/1440-sleep) using the compositional mean for sleep

foreach n in sleep mvpa sed lpa {
ameans `n'_min
gen `n'_geo_r=r(mean_g)
}
gen total_geo_r=sleep_geo_r+mvpa_geo_r+sed_geo_r+lpa_geo_r
sum total_geo_r
gen geo_norm_r=1440/r(mean)
foreach n in sleep mvpa sed lpa {
gen `n'_geo_norm_r=`n'_geo_r*geo_norm_r
}

foreach n in sleep sed lpa mvpa{
gen s_`n'_r=0.1*(`n'_geo_norm_r/(1440-`n'_geo_norm_r))
gen kincr_`n'_r=1.10/(1-s_`n'_r)
gen kdecr_`n'_r=0.90/(1+s_`n'_r)
gen tenpercent_`n'_r=0.1*`n'_geo_norm_r
}
sum tenpercent*_r