A )she will pay R 31.6752
B) she payed 80%
For A 20÷100 ×43.99÷1
= 878,8÷100
=R8,792
43.99-8.792=35.198 she would have payed this with no 10 percent but with it she payed..
10/100×35.198/1
=351.98/100
3.5198
35.198-3.5198=31.6752
for b just say 100 % - 10%-20% =70%