Question

18+[3-{1+(4×3/16)}]...

Answer 1

18+[3-(1+(3/4)]
18+3-(1.75)
21-1.75
20.75
20.75 is the answer

Answer 2

Hey
18 + [3-{1+(4*3/16)}]
= 18 + [3-{1+(3/4)}]
18 + [3-{1+3/4)]
18 + [3-{4+3/4)]
18 + [3-{7/4)]
18 + [3-7/4)]
18 + [12 - 7/4)]
18 + [5/4)]
$18 + \frac{5}{4} \\ \frac{72 + 5}{4} \\ \frac{77}{4} answer$
Hope it helps :))