bjr
36/45 = 9x4 / 9x5 = 4/5
Bonjour
36/45
= (2 x 2 x 3 x 3) / (3 x 3 x 5)
= [(3 x 3) x (2 x 2)] / [(3 x 3) x 5]
= (9 x 4) / (9 x 5)
= 4/5