252
648 = ?%*900 648 = x/100*900 648 = 9x x = 648/9 x = 72
648/(72/100) = 900 Therefore, the number that 648 is 72 percent of, is 900.
72%
72%
8,000 minus 900 is 7,100.
7 billion minus 900 million = 6,100,000,000
1,143 - 900 = 243
1224 - 900 = 324
There are a total of 900 3-digt numbers (100 thru 999); Of these there are 9x9x8 = 648 numbers that do not contain repeating digits (first position: 9 possibilities, second place 9 possibilities; the 10 digits minus the one used in the first place. and third place 8 possibilities; 10 digits minus the two used in the first and second places) So, there should be 900-648=252 3-digit numbers with at least one repeating digit.
3000 minus 900 = 2100
900 - 20% = 720
745.14