At a rugby match the ratio of children to adults is 2:3 .There are 80 children in the crowd .How many adults are in the crowd?
Ratio of children to adults = 2:3
Set up the equation: 2:3 = 80:x
2/3 = 80/x
Cross-multiply: 2·x = 80·3
2x = 240
Divide by 2: x = 120
