Answer :
*edited*
3/5 of the students are boys
"of" means multiplication
45 times 3/5 = 27
so there are 27 boys
the rest are girls
45 - 27 = 18
so there are 18 girls
3/5 of the students are boys
"of" means multiplication
45 times 3/5 = 27
so there are 27 boys
the rest are girls
45 - 27 = 18
so there are 18 girls
45 total means
45=boys+girls
if 3/5 are boys then
3/5 area boys
3/5 of 45=boys
'of' can be translated as multiply for fractions
3/5 times 45=135/5=27
27 are boys
45=b+g
b=27
subsitute
45=27+g
subtract 27 from both sides
18=g
18 girls
27 boys
18 girls
45=boys+girls
if 3/5 are boys then
3/5 area boys
3/5 of 45=boys
'of' can be translated as multiply for fractions
3/5 times 45=135/5=27
27 are boys
45=b+g
b=27
subsitute
45=27+g
subtract 27 from both sides
18=g
18 girls
27 boys
18 girls