Question

express 5.7 bar (bar on 7) in the form of p/q

Answer 1

let x = 5.7bar
10x=57.7bar
subtracting 10x = 57.7bar
- x = 5.7 bar
9x = 52
x = 52/9

Answer 2

x=5.7(bar on 7)--1 equation
10×x=5.7(bar on 7)×10
10x=57.7(bar on 7)--2 equation

subtract equation 1 from equation 2
10x-x=57.7(bar on 7)-5.7(bar on 7)
9x=52
x=52/9