# math

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300 hundred kids attend a dance. The ratio of boys to girls is 6 to 4. If 30 boys and 20 girls leave, what is the new ratio of boys to girls still at the dance

• math -

There are 6x boys and 4x girls.
add them up: 10x = 300, so x=30.

There are 180 boys and 120 girls.

(180-30):(120-20) = 150:100 = 3:2

• math -

A school has 140 boys and girls. The ratio of boys to girls is 2 to 5. How many students are boys and how many students are girls?

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