di jawab y besok di kumpulin.

5 1/4 = 21/4
2 4/5 = 14/5
2 1/2 = 5/2

(21/4 : 14/5) : 5/2 = (21/4 x 5/14) x 2/5 = 105/56 x 2/5 = 210/280 = 42/56 = 6/8 = 3/4

semoga membantu ^^