Ruth rented a moving van for relocation. The empty van weighed 1,255 pounds. Once all the cartons and equipment were loaded, the van weighed 8,283 pounds. What is the increase in percentage of the weight of the van?
The increase in weight of the van is 8,283 pounds - 1,255 pounds = <<8283-1255=7028>>7028 pounds.
The percentage increase in weight of the van is 7028 pounds / 1255 pounds × 100% = <<7028/1255*100=559.68>>559.68%. Answer: \boxed{559.68}.