Answer:
0.35 is one thousandth of 350
Step-by-step explanation:
Let
x ----> the number
we know that
The number multiplied by one thousandth must be equal to 0.35
so
The linear equation that represent this situation is

solve for x
Multiply both sides by 1,000

therefore
0.35 is one thousandth of 350
100-r=99.52
First, add r to both sides.
100-r+r=99.52+r
And then simplify.
100=99.52+r
Then, subtract 99.52 from both sides.
100-99.52=99.52+r-99.52
And simplify.
0.48=r
So,
r=0.48