Amanda has 4 scores recorded in math for the current nine weeks grading period. She has received the following scores: 14/15 30/35 7/10 85/100...

Hello!

Imagine that the fifth assignment is done for `n` points from the maximum 80. Then the total number of points Amanda has received is

`14+30+7+85+n=136+n.`

The maximum possible number of points is

`15+35+10+100+80=240.`

The number of points received must be greater than or equal to 85% of the total number of points, i.e.

`136+ngt=85/100 *240=85/10*24=17*12=204,`

or  `ngt=204-136=68.`

This is the answer: Amanda needs to score at least 68 points on the next project.