During a single fission event of a 235U nucleus, the mass defect is 0.20u. If the total initial mass of the reacting system (uranium nucleus plus one neutron) is 236u, calculate the percentage of the initial mass that is converted into energy. (Use 1u=1.66×10−27kg; the numerical value of 1u is not needed for the percentage.)
(a) 0.85%
(b) 0.0085%
(c) 0.085%
(d) 0.10%