Answer:
4%
Step-by-step explanation:
20% more ➞ 100% +20%= 120%
20% less ➞ 100% -20%= 80%
[tex]J= 120\% Y ---(1)\\ B= 80\% J ---(2)[/tex]
Subst. (1) into (2):
[tex]B = \frac{80}{100} ( \frac{120}{100}Y) \\ B = \frac{4}{5} ( \frac{6}{5} Y) \\ B = \frac{24}{25}Y \\ B = 0.96Y \\ B = 96\%Y[/tex]
Difference
= 96% -100%
= -4%
Thus, Bob had 4% less money than Yao.
