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Mr. Robert's budget for phone fee, utility and rent was $1200 per month. He spends 17% of it on phone feet, 28% of it on utility and the remaining for rent. The rent was fixed for each month. If he wants to decrease his budget for utility by 10% the following month,

(a) How much can he spend on phone fee with the same amount of budget?

dollars 

(b) What’s the spending difference of his phone after his changing? 

dollars

Correct!