Cuanto es 3 / 5 de 256, 3 / 8 de 854, 4 / 5 de 90, 2 / 3 * 24, 3 / 4 * 56, 2 1 / 2 veces 15?

Multiplica y divide :

256 * <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B5%7D%20" /> = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B768%7D%7B5%7D%20" /> = 153.

6

854 * <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B8%7D%20" /> = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B2562%7D%7B8%7D%20" /> = 320.

25

90 * <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B4%7D%7B5%7D%20" /> = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B360%7D%7B5%7D%20" /> = 72

24 * <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B2%7D%7B3%7D%20" /> = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B48%7D%7B3%7D%20" /> = 16

56 * <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B4%7D%20" /> = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B168%7D%7B4%7D%20" /> = 42

15 * 2[img = 10] = 15 * [img = 11] = [img = 12] = 37.

5.