=5%÷ 10%

=50%

A: Fangfang's family spends 50% more on clothes than on water and electricity.

(2)750÷(40%-25%

=750÷ 15%

=5000 yuan

A: The total expenditure in January was 5,000 yuan.

(3)5000×(40%- 10%)

=5000×30%

= 1500 (yuan)

A: Fangfang Gay spends more on food than other expenses 1500 yuan.

So the answer is: 50,5000, 1500.