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The ratio of boys to girls at the dance was 3:4. There were 60 girls at the dance. How many boys were at the dance?
Use a proportion comparing boys to girls at the dance. Boys/girls¾ = x/60Solve the proportion through cross-multiplying, setting the cross-products equal to each other and solving as display below.(3)(60) = 4x180 = 4x180/4 = 4x/445 = xThere were 45 boys.
There are 81 women teachers at Russell High. If 45% of the teachers in the school are women, how many teachers are there at Russell High? Use the proportion part/whole = %/100.
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