这个应该怎么算啊!头都大了,Suppose that the nominal national income in some country fell from 100 to 95 during the year.Over the same period,inflation was 5 percent.Therefore the real national income in this countryA) fell by 10 percent.B)

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这个应该怎么算啊!头都大了,Suppose that the nominal national income in some country fell from 100 to 95 during the year.Over the same period,inflation was 5 percent.Therefore the real national income in this countryA) fell by 10 percent.B)
这个应该怎么算啊!头都大了,
Suppose that the nominal national income in some country fell from 100 to 95 during the year.
Over the same period,inflation was 5 percent.Therefore the real national income in this country
A) fell by 10 percent.
B) fell by 5 percent.
C) was unaffected.
D) rose by 5 percent.
E) rose by 10 percent.

这个应该怎么算啊!头都大了,Suppose that the nominal national income in some country fell from 100 to 95 during the year.Over the same period,inflation was 5 percent.Therefore the real national income in this countryA) fell by 10 percent.B)
答案A