Fred completed 10 math problems. This is 40% of the number of math problems he has to do. How many math problems must he do?
2 answers:
Answer:
25 problems
Step-by-step explanation:
10 problems = 40%
1 problem =4 %
5 problems = 20%
5 problems (20%) x 5 (to get 100%) = 25 problems
Answer:
25 math problems
Step-by-step explanation:
He completed 10 out of x, or the total he has to do.
10/x
We know that this equals 40%
10/x=40/100
Cross multiply to solve
40*x=100*10
40x=1000
Divide both sides by 40
x=25
He must do 25 math problems
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