Question

2 1/6+2 1/12*(0.25-1.64/0.8)

Answer 1

21/6+21/12*(0.25-1.64/0.8)
21/6+21/12*(-1.8)
21/6-37.8/12
21*2/6*2-37.8/12
42/12-37.8/12
4.2/12=0.35