by what percentage will the space in one north endnew york new york decrease in 2019?
item 1b . unresolved staff comments not applicable . item 2 . properties our global headquarters are located in chicago , illinois , at 20 south wacker drive . the following is a description of our key locations and facilities . location primary use owned/leased lease expiration approximate size ( in square feet ) ( 1 ) 20 south wacker drive chicago , illinois global headquarters and office space leased 2032 ( 2 ) 512000 141 west jackson chicago , illinois trading floor and office space leased 2027 ( 3 ) 150000 333 s . lasalle chicago , illinois trading floor and office space owned n/a 300000 550 west washington chicago , illinois office space leased 2023 250000 one north end new york , new york trading floor and office space leased 2028 ( 4 ) 240000 .

| Location | Primary Use | Owned/Leased | Lease Expiration | Approximate Size(in square feet)<sup>(1)</sup> |
| :--- | :--- | :--- | :--- | :--- |
| 20 South Wacker Drive Chicago, Illinois | Global headquarters and office space | Leased | 2032<sup>(2)</sup> | 512,000 |
| 141 West JacksonChicago, Illinois | Trading floor and office space | Leased | 2027<sup>(3)</sup> | 150,000 |
| 333 S. LaSalleChicago, Illinois | Trading floor and office space | Owned | N/A | 300,000 |
| 550 West WashingtonChicago, Illinois | Office space | Leased | 2023 | 250,000 |
| One North EndNew York, New York | Trading floor and office space | Leased | 2028<sup>(4)</sup> | 240,000 |
| One New Change London | Office space | Leased | 2026 | 58,000 |
| Data Center 3Chicagoland area | Business continuity and co-location | Leased | 2031<sup>(5)</sup> | 83,000 |
| Bagmane Tech Park Bangalore, India | Office space | Leased | 2020<sup>(6)</sup> | 72,000 |

data center 3 chicagoland area business continuity and co-location leased 2031 ( 5 ) 83000 bagmane tech park bangalore , office space leased 2020 ( 6 ) 72000 ( 1 ) size represents the amount of space leased or owned by us unless otherwise noted . ( 2 ) the initial lease expires in 2032 with two consecutive options to extend the term for five years each . ( 3 ) the initial lease expires in 2027 and contains options to extend the term and expand the premises . ( 4 ) the initial lease expires in 2028 and contains options to extend the term and expand the premises . in 2019 , the premises will be reduced to 225000 square feet . ( 5 ) in march 2016 , the company sold its datacenter in the chicago area for $ 130.0 million . at the time of the sale , the company leased back a portion of the property . ( 6 ) the initial lease expires in 2020 and contains an option to extend the term as well as an option to terminate early . item 3 . legal proceedings see 201clegal and regulatory matters 201d in note 12 . contingencies to the consolidated financial statements beginning on page 87 for cme group 2019s legal proceedings disclosure which is incorporated herein by reference . item 4 . mine safety disclosures not applicable. .

space_2019 = 225000
space_2018 = 240000
percent_change = (space_2019 - space_2018) / space_2018
answer = percent_change * 100