Pls answer this Question cause this question is form my homework

Question

sally cuts a piece of ribbon 147 cm long into three pieces in the ratio 5:3:2, what is length of the longest ribbon

pls tell

Answer 1

longest piece of ribbon = 147/2 = 73 1/2 cm

5/(5+3+2) = 1/2

1/2 of 147 = 73.5 = 73 1/2 cm