simplify 72:90???

OK
Divide both numbers by 9 and you have 8:10
Divide both those numbers by 2 and you have 4:5

72 : 90
36 : 45
4 : 5

72:90 = 4:5

divide 72 and 90 by their Greatest common factor, which happens to be 18

72/18 = 4
90/18 = 5

4:5

=)

72:90
= 72 ÷ 18 : 90 ÷ 18
= 4:5

hi!

it's
4:5

72/90 =

=36/45 (you divided by 2 both the denominator and the numerator)

=12/15 (divided by 3)

= 4/5 (divided by 3 again)

4:5

simple.. tell me u didnt know this!!

72:90 = 72/90 = 72÷18 / 90÷18 = 4/5 =4:5 (= 0.80)