(0.2x15) : (0.8x7.5) ::_________:(0.25x56)

Answer 1

(0.2x15) : (0.8x7.5) ::_________:(0.25x56), I assume your :: means "=" ?

(0.2x15) / (0.8x7.5) = X/(0.25x56)

X = (0.25x56)(0.2x15) / (0.8x7.5)
X = 7

Answer 2

(0.0625x112)