00:01
Okay, so we're looking at a pie chart for mary's monthly income.
00:05
And let's say, for example, if we know that mary makes $7 ,500 a month, what we want to determine is how much she earns in each category.
00:19
All right, and we'll call teaching, te, tutoring will be tu.
00:25
We have cookie sales, which is c, and bank entrance will just put b.
00:31
So what we'll need to do is multiply the total amount, 7 ,500 times each one of the percentages.
00:38
For teaching, it would be $5 ,250, right? $7 ,500 of that would be $5 ,200.
00:50
For tutoring, she would make $1 ,125.
00:57
For cookie sales, she would earn $750 a month.
01:01
And for bank interest, she would get $375 a month, which is 5 % of 750.
01:11
Now, if we work backwards and say we don't know that the budget is $75, the total is $7 ,500...