In a box of 240 thumbtacks 25% are yellow 40% are blue and rest are red

Question

How many blue?

how many yellow?

how many red?

 

Answer 1

25% means ¼; one fourth of 240 = 60 yellow 

40% of 240 can be calculated as 0.4(240) = 96 (blue).

 

you could calculate the # of reds by subtracting the above two quantities from 240.

 

in Math, "OF" means multiply!