In February, Zeph gave his wife, Cindy, $8000 for household expenditure. Cindy spent 60% of the sum on rental, 20% on food and saved the rest. In March, Zeph reduced the sum he gave to Cindy. Cindy spent the same amount on rental and reduced the amount she spent on food by 25%. She saved the remaining 20% of the sum given to her in March. By what percentage was the sum given to Cindy reduced by?

	Rental	Food	Savings	Total
Before	60%	20%	20%	$8000
Change		- 5%	- ?	- ?
After	60%	15%
Comparing the amounts spent in March	80 u		20 u	100 u

Amount that Zeph saved in percent
= 100% - 60% - 20%
= 20%

Amount that Zeph reduced on food in percent
= 25% x 20%
= ²⁵₁₀₀ x 20
= 5%

Total amount that Zeph spent on rental and food in percent
= 60% + 15%
= 75%

100% → 8000

1% → 8000 ÷ 100 = 80

75% → 75 x  80 = 6000

The total amount that Zeph spent on rental and food is repeated. 

80 u = 75% 

80 u = 6000

1 u = 6000 ÷ 80 = 75

Amount that Zeph gave to Cindy in March
= 100 u
= 100 x 75
= $7500

Amount that Cindy received less from Zeph from February to March
= 8000 - 7500
= $500

Percentage that the sum given to Cindy was reduced by from February to March
= ⁵⁰⁰₈₀₀₀ x 100%
= 6.25%

Answer(s): 6.25%