The initial balance was 100$ those who used the chwck withdrew 53$ from the account, so the balance became: 100-53=47$ Javion then deposited 17$ in the account,so the final balance is: 47+17=64$
50% is equal to 5/10 so 5/10 were party cakes 1/5x2=2/10 so 2/10 were fruit cakes 5/10+2/10=7/10 so 10/10 which is 100% of all cakes 10/10-7/10=3/10 so 3/10 of the cakes were sponge cakes.