Homework Help: arithmetic

Posted by Raj c on Friday, November 13, 2009 at 11:27am.

A man spend 75% of his income. when his income is increse by 20%. He increse his expenditure 10% . By what percent are his saving increse ?

arithmetic - bobpursley, Friday, November 13, 2009 at 11:55am
Original income= I

.25I=Savings original
.15(I*1.20)=new savings.

percent increase= (New-old)/old * 100
= (.18I-.25I)/.25I * 100

It appears his savings decreased.

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