Problem: After eating a hearty meal they went to see the Buckingham palace. There were 39 paintings in the Buckingham palace. There, Rachel learned that 661 visitors came to the Buckingham palace that day. If there were 600 visitors the previous day, how many more visitors visited the Buckingham palace on that day than on the previous day?
Solution: ( 661.0 - 600.0 ) = 61