In an examination in which the full marks were 500, A scored 25% more marks than B, B scored 60% more marks than C and C scored 20% less marks than D. If A scored 80% marks, then the percentage of marks obtained by D is:

50%

25% = \(\frac{1}{4}\) , 60% = \(\frac{3}{5}\) , 20 % = \(\frac{1}{5}\)

Ratio of A to B = 5 : 4 

           B to C = 8 : 5        

           C to D = 4 : 5

Overall  A :  D = 160 : 100

= 8 : 5

That means , If A got 80% than B got 50%