Question 516986
{{{17/70=x/100}}}
{{{1700=70x}}}
24.2857hrs for 100%
{{{24.2857-17=7.2857}}}
so 7.2857hrs more
or 7hrs 17mins 8.5secs

oops well this is correct but if you wanted the equation for the problem to solve straight forward its: 
{{{17/70=(17+x)/100}}}
{{{1700=70(17+x)}}}
{{{1700=1190+70x}}}
{{{510=70x}}}
{{{7.2857=x}}}




check:
.7=70%
{{{.7*24.2857=16.9999}}}
.3=30% which is what is missing
{{{.3*24.2857= 7.2857}}}
changing the times from hrs to mins to secs:
its at 7 hours plus the extra which i changed to mins
{{{.2857*60=17.1426}}} so 17mins and extra turns into secs
{{{.1426*60=8.556}}} so 8.5secs
giving 7hrs 17mins and 8.5secs