+385 A class of 40 children is 60$\%$ boys. At least how many boys would have to be replaced by girls to make a majority of the class girls?
+539 If we want to replace, we want to make the amount of girls more than half of the class. SInce there are 40 kids, half the class would be 20, so the greatest number larger than half the class is 21. So we want at least 21 girls. 60% of 40 = .6*40=6*4=24. If there are 24 boys, then there are 16 girls. 21-16 is 5 girls have to be the replacements for 5 boys.
