Answer:
84 men
Step-by-step explanation:
The ratio of men to children is ...
men/children = 35%/30% = 7/6
Given the number of children is 72, the number of men is ...
men/children = 7/6 = men/72
men = (7/6)(72) = 84
There are 84 men at the party.
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Additional comment
The fraction of women is 100% -30% -35% = 35%, the same as the number of men. There are 84 women at the party and 240 total people.