1.Mr.Chan had some money.He spent 30﹪on the first day.Then he spent 25﹪of the remaining amout on the second day and he got $1680 left.
a.How much did he have originally?
b.If Mr.Chan spent another $320,what percentage of the money did he spend altogether?
maths1
2007-03-08 4:52 am
回答 (2)
2007-03-08 5:05 am
✔ 最佳答案
a) Let x be the amount he has originallyx(1-30%)(1-25%)=1680
x(0.7x0.75)=1680
x=$3200
b) 3200-1680+320
=$1840
2007-03-08 5:09 am
a. L et his whole be x .
30%x+(1-30%)25%x=1680
b. (320/a`s answer)*100%
30%x+(1-30%)25%x=1680
b. (320/a`s answer)*100%
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