Question 301972
The truck is 2000 kg 
Load is 80% of the total weight 

Total weight = truck + load 
This means: 100% = 20%(weight of the truck) + 80%(weight of the load)

20% --- 2000 kg 
1% --- (2000÷20)kg = 100kg 
80% ---- 80 x 100 = 8000kg 

After first stop, 1/4 of the load is discharge.
This means, 3/4 of the load is left on the truck. 

3/4 of 8000 kg 
= 6000 kg

The new total weight = 6000 + 2000 = 8000 kg 

Percentage of the new load = (6000/8000) x 100% = 75% 

Answer: (E)