Answer :
133 is 7% of 1900.
100/7=14.28571428571429
133 x 14.28571428571429= 1900
1900-93%=133
1900+7%=2033
2033-1900=133
That's the best I can explain it
[tex]\begin{array}{ccc}7\%&-&133\\\\100\%&-&x\end{array}\\\\7x=133\cdot100\ \ \ /:7\\\\x=\frac{133\cdot100}{7}\\\\x=19\cdot100\\\\x=1\ 900\to answer[/tex]
