Mass number minus the atomic number equals the number of neutrons. Mass number is the number of particles in an atom that have significant mass. Electrons are assigned a valâ¦ue of 0 since the mass is so much smaller than protons and neutrons. Protons and neutrons are similar in mass and are assigned mass number of 1.
Why Uber is losing so much money? The biggest part of the problem is that Uber is a relative small fish in the market and is not getting nearly enough customers. According to analyst reports, as of August 2015, Didi Kuaidi completed seven million rides as opposed to Uber's one million.
After adding up those costs, some drivers say, making a profit is nearly impossible. Uber spokesman Taylor Bennett said drivers do get 80 percent of the fares they earn; the company takes 20 percent to cover costs for marketing, driversâ background checks, insurance and other administrative costs.