Problem: A chemist has m ounces of salt water that is m% salt. How many ounces of salt must he add to make a solution that is 2 m% salt?
Answer Choices:
A. 100+mm
B. 100−2m2m
C. 100−2 mm2
D. 100+2 mm2
E. 100+m2 m
Solution:
m+x100m2+x=1002m∴x=100−2mm2