Find the unknown x (12%) (1) 3:8 = x: 2.4 (2) x: 5 =: 0.5 (3): x = 6

Find the unknown x (12%) (1) 3:8 = x: 2.4 (2) x: 5 =: 0.5 (3): x = 6

(1)3:8 = x:2.4
8x=3×2.4
x=3×2.4÷8
x=0.9
The last two questions are incomplete