In February, Flynn gave his wife, Elyse, $6000 for household expenditure. Elyse spent 60% of the sum on rental, 10% on food and saved the rest. In March, Flynn reduced the sum he gave to Elyse. Elyse spent the same amount on rental and reduced the amount she spent on food by 20%. She saved the remaining 20% of the sum given to her in March. By what percentage was the sum given to Elyse reduced by?

	Rental	Food	Savings	Total
Before	60%	10%	30%	$6000
Change		- 2%	- ?	- ?
After	60%	8%
Comparing the amounts spent in March	80 u		20 u	100 u

Amount that Flynn saved in percent
= 100% - 60% - 10%
= 30%

Amount that Flynn reduced on food in percent
= 20% x 10%
= ²⁰₁₀₀ x 10
= 2%

Total amount that Flynn spent on rental and food in percent
= 60% + 8%
= 68%

100% → 6000

1% → 6000 ÷ 100 = 60

68% → 68 x  60 = 4080

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

80 u = 68% 

80 u = 4080

1 u = 4080 ÷ 80 = 51

Amount that Flynn gave to Elyse in March
= 100 u
= 100 x 51
= $5100

Amount that Elyse received less from Flynn from February to March
= 6000 - 5100
= $900

Percentage that the sum given to Elyse was reduced by from February to March
= ⁹⁰⁰₆₀₀₀ x 100%
= 15%

Answer(s): 15%