Question

[(2/3 x 9/10) -3/2] -7/4 : (-21/8)

Answer 1

2/3 x 9/10 = 18/30 simplificando 6/10

6/10 - 3/2 = 6/10 - 15/10 = -9/10

-7/4 : -21/8 = -7/4 x -8/21 = +56/84 = +14/21

14/21 - 9/10 = 140/210 - 189/210 = -49/210 = -7/30

resultado: -7/30