The number of plain books sold by store A and store B was 30% | Data Interpertation & airthmatic

The number of plain books sold by store A and store B was 30% and 40% respectively then find number of lined books sold by store A and store B together is what percent of total books available at store A ?

a) 22 6/7 %
b) 23 4/7%
c) 25 5/7 %
d) 25%
e) None of these