Prime Factors of 504: 2, 3, 7
23 × 32 × 71 where 2, 3, 7 are prime.
Start off by doing
64/1000
that should equal 0.064
0.064 and quare it by 3
0.4
which equals 4/10
First find the difference that went by subtracting the 2 numbers:
340 - 306 = 34
divide that by the number of students that went to the first dance:
34 / 340 = 0.1 = 10% decrease
