Question

what is the percent increase.? original quantity :100 new quantity 106

Answer 1

The percent increase is 6% because it increased by 6 and 6 is 6% of 100. 
Hope this helps!

Answer 2

we know that

the number $100$ (original quantity) represent the $100\%$

the number $106$ (new quantity) represent the $x\%$

Step $1$

by proportion find the value of x%

$\frac{100}{100\%} =\frac{106}{x\%}\\\\x*100=100*106\\ \\x=106\%$

Step $2$

Find the increase percentage

$increase\ percentage=106\%-100\%=6\%$

therefore

the answer is

The percent increase is $6\%$