GWD 17-30

[eureka]

Q30:
Jim’s income comes from his wages and from tips. For a certain month, if Jim’s income from his wages was 180 percent of his income from tips, approximately what percent of his total income came from tips?

A. 18%
B. 25%
C. 36%
D. 50%
E. 72%

answer:C

我的問題是
我認為w=(1+1.8)t
可是要算出C的答案,是w=1.8t
關鍵在於if Jim’s income from his wages was 180 percent of his income from tips這句
請問大家，應該要怎麼理解呢?

[clbb]

total income=2.8t沒錯呀

題目求的是tips/total income的百分比

=t/2.8t=0.357

所以答c

[eureka]

total income=2.8t沒錯呀

題目求的是tips/total income的百分比

=t/2.8t=0.357

所以答c

I=w+t=2.8+1=3.8
t/I=t/3.8t

我是這樣想的，不知道各位認為如何?
謝謝

[micki]

total income=2.8t沒錯呀

題目求的是tips/total income的百分比

=t/2.8t=0.357

所以答c

I=w+t=2.8+1=3.8
t/I=t/3.8t

我是這樣想的，不知道各位認為如何?
謝謝

Jim’s income from his wages was 180 percent of his income from tips => w=1.8t

total income = w+t = 1.8t+t = 2.8t

題目求的是tips/total income的百分比 = t/2.8t = 0.357 =35.7%
所以答案是 C - 36%