First, you need to find 72% of 1,000. Of means multiply. .72 * 1,000 = 720. 720 dogs out of 1,000 are male. For every 5 of those dogs, 3 is over five. I'm going to make it easier so I'll divide by 5. 720 = 144 There are 144 groups of five. 144 / 3 = 48. 48 * 5 = 240. 240 dogs out of 1,000 are males over the age of 5.
PS...If this is wrong, you've learned your lesson.
1. Never take math answers from students in PreAlg. 8)
2. Do your own homework. (8