To find out how many boys there are, we need to multiply the total number of children by the fraction 3/8: 480 children * 3 boys / 8 children = <<480*3/8=180>>180 boys
To find out how many more girls than boys there are, we subtract the number of boys from the total number of children: 480 children - 180 boys = <<480-180=300>>300 girls. Answer: \boxed{300}.
There are 480 children in a hall. 3 8 of them are boys. How msny more girls than boys are there?
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