9 . lease commitments the company leases certain land , facilities , equipment and software under various operating leases that expire at various dates through 2057 . the lease agreements frequently include renewal and escalation clauses and require the company to pay taxes , insurance and maintenance costs . total rental expense under operating leases was approximatelya $ 92.3 million in fiscal 2019 , $ 84.9 million in fiscal 2018 and $ 58.8 million in fiscal 2017 . the following is a schedule of futureff minimum rental payments required under long-term operating leases at november 2 , 2019 : operating fiscal years leases .

operating leases: 2020: 79789
2021: 67993
2022: 40338
2023: 37673
2024: 32757
later years: 190171
total: 448721

10 . commitments and contingencies from time to time , in the ordinary course of the company 2019s business , various claims , charges and litigation are asserted or commenced against the company arising from , or related to , among other things , contractual matters , patents , trademarks , personal injury , environmental matters , product liability , insurance coverage , employment or employment benefits . as to such claims and litigation , the company can give no assurance that it will prevail . the company does not believe that any current legal matters will have a material adverse effect on the company 2019s financial position , results of operations or cash flows . 11 . retirement plans the company and its subsidiaries have various savings and retirement plans covering substantially all employees . defined contribution plans the company maintains a defined contribution plan for the benefit of its eligible u.s . employees . this plan provides for company contributions of up to 5% ( 5 % ) of each participant 2019s total eligible compensation . in addition , the company contributes an amount equal to each participant 2019s pre-tax contribution , if any , up to a maximum of 3% ( 3 % ) of each participant 2019s total eligible compensation . the total expense related to the defined contribution plans for u.s . employees was $ 47.7 million in fiscal 2019 , $ 41.4 million in fiscal 2018 and $ 35.8 million in fiscal 2017 . non-qualified deferred compensation plan the deferred compensation plan ( dcp ) allows certain members of management and other highly-compensated employees and non-employee directors to defer receipt of all or any portion of their compensation . the dcp was established to provide participants with the opportunity to defer receiving all or a portion of their compensation , which includes salary , bonus , commissions and director fees . under the dcp , the company provides all participants ( other than non-employee directors ) with company contributions equal to 8% ( 8 % ) of eligible deferred contributions . the dcp is a non-qualified plan that is maintained in a rabbi trust . the fair value of the investments held in the rabbi trust are presented separately as deferred compensation plan investments , with the current portion of the investment included in prepaid expenses and other current assets in the consolidated balance sheets . see note 2j , fair value , for further information on these investments . the deferred compensation obligation represents dcp participant accumulated deferrals and earnings thereon since the inception of the dcp net of withdrawals . the deferred compensation obligation is presented separately as deferred compensation plan liability , with the current portion of the obligation in accrued liabilities in the consolidated balance sheets . the company 2019s liability under the dcp is an unsecured general obligation of the company . analog devices , inc . notes to consolidated financial statements 2014 ( continued ) .

Questions:
from 2018 to 2019, what was the change in the total rental expense under operating leases?
and what was that rental expense in 2018?
what percentage, then, did that change represent in relation to this 2018 amount?
and over the subsequent year of that period, what was that change in the rental expense?
and what is this change as a percentage of the 2019 rental expense?

Answers:
7.4
84.9
8.7%
-12.5
-13.5%