Question 1112862
Let us define as the variable we are trying to find
{{{x}}}=average score
 
Percentages are ratios to 100,
and they can be expressed as fractions or decimals:
{{{"90%"=90/100=0.9}}} is the ratio to multiply by.What they tell you in words is
{{{handicap=(220-x)*0.9}}}
 
To calculate what {{{x}}} values would yield a handicap of 72 or less,
you start by writing
{{{(220-x)*0.9<=72}}} , and then solve for {{{x}}} .
 
{{{(220-x)*0.9<=72}}}
{{{220-x<=72/0.9}}}
{{{220-x<=80}}}
{{{220-80<=x}}}
{{{140<=x}}} .
So, a player with an average score of 140 or more would have {{{highlight(x>=140)}}} , and a handicap of 72 or less.