Question

express 0.003 bar in the p/q

Answer 1

let x=0.003
multiplying both side by 1000
1000x=3
it be eq 1
multiplying both side by10000
10000x=30
it be eq 2
subtracting 1from 2
10000x-1000x=30-3
9000x=27
x=27/9000
x=3/1000