In March, Zane gave his wife, Julie, $5000 for household expenditure. Julie spent 50% of the sum on rental, 20% on food and saved the rest. In April, Zane reduced the sum he gave to Julie. Julie spent the same amount on rental and reduced the amount she spent on food by 20%. She saved the remaining 25% of the sum given to her in April. By what percentage was the sum given to Julie reduced by?

	Rental	Food	Savings	Total
Before	50%	20%	30%	$5000
Change		- 4%	- ?	- ?
After	50%	16%
Comparing the amounts spent in April	75 u		25 u	100 u

Amount that Zane saved in percent
= 100% - 50% - 20%
= 30%

Amount that Zane reduced on food in percent
= 20% x 20%
= ²⁰₁₀₀ x 20
= 4%

Total amount that Zane spent on rental and food in percent
= 50% + 16%
= 66%

100% → 5000

1% → 5000 ÷ 100 = 50

66% → 66 x  50 = 3300

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

75 u = 66% 

75 u = 3300

1 u = 3300 ÷ 75 = 44

Amount that Zane gave to Julie in April
= 100 u
= 100 x 44
= $4400

Amount that Julie received less from Zane from March to April
= 5000 - 4400
= $600

Percentage that the sum given to Julie was reduced by from March to April
= ⁶⁰⁰₅₀₀₀ x 100%
= 12%

Answer(s): 12%