In April, Ben gave his wife, Anna, $7000 for household expenditure. Anna spent 50% of the sum on rental, 20% on food and saved the rest. In May, Ben reduced the sum he gave to Anna. Anna spent the same amount on rental and reduced the amount she spent on food by 30%. She saved the remaining 20% of the sum given to her in May. By what percentage was the sum given to Anna reduced by?

	Rental	Food	Savings	Total
Before	50%	20%	30%	$7000
Change		- 6%	- ?	- ?
After	50%	14%
Comparing the amounts spent in May	80 u		20 u	100 u

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

Amount that Ben reduced on food in percent
= 30% x 20%
= ³⁰₁₀₀ x 20
= 6%

Total amount that Ben spent on rental and food in percent
= 50% + 14%
= 64%

100% → 7000

1% → 7000 ÷ 100 = 70

64% → 64 x  70 = 4480

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

80 u = 64% 

80 u = 4480

1 u = 4480 ÷ 80 = 56

Amount that Ben gave to Anna in May
= 100 u
= 100 x 56
= $5600

Amount that Anna received less from Ben from April to May
= 7000 - 5600
= $1400

Percentage that the sum given to Anna was reduced by from April to May
= ¹⁴⁰⁰₇₀₀₀ x 100%
= 20%

Answer(s): 20%