Q: 53 (IAS/2010)

Two numbers X and Y are respectively 20% ad 28% less than a third number Z. By what percentage is the number Y less than the number X?
question_subject: 
Maths
question_year: 
2010
question_exam: 
IAS
question_sub_subject: 
Mathematics
question_topic: 
Mathematics
stats: 
0,224,168,80,40,224,48