test.py

vw = 100
vl = 0
vm = 100
vls = 100
ratio = 1
step = 0.00001
while vls > 0:
    if vw == 0:
        break
    vw = vw - (vw/100) * step
   # vl = vl - (vl/vw) * step + step
    vls = vls - step

print(vl, vw, vls)