text: Other identifiable intangible assets were as follows:
text: Non-amortizing intangible assets are comprised of brands and trademarks.
text: Amortizing intangible assets, carrying a remaining weighted-average life of approximately 20 years, are principally composed of customer relationships, and acquired intellectual property. For fiscal 2019, 2018, and 2017, we recognized amortization expense of $49.1 million, $34.9 million, and $33.6 million, respectively. Based on amortizing assets recognized in our Consolidated Balance Sheet as of May 26, 2019, amortization expense is estimated to average $58.3 million for each of the next five years, with a high expense of $59.9 million in fiscal 2020 and decreasing to a low expense of $54.2 million in fiscal 2024.
text: During fiscal 2019, in conjunction with the divestiture of our Italian-based frozen pasta business, Gelit, we reclassified $15.1 million and $1.7 million of goodwill and other identifiable intangible assets, respectively, to noncurrent assets held for sale for periods prior to the divestiture.
text: During fiscal 2019, as a result of our annual impairment test for indefinite lived intangibles, we recognized impairment charges of $76.5 million for our Chef Boyardee® and Red Fork® brands in our Grocery & Snacks segment. We also recognized impairment charges of $13.1 million for our Aylmer® and Sundrop ® brands in our International segment.
text: During fiscal 2018, as a result of our annual impairment test for indefinite lived intangibles, we recognized impairment charges of $4.0 million for our HK Anderson® , Red Fork® , and Salpica® brands in our Grocery & Snacks segment. We also recognized an impairment charge of $0.8 million for our Aylmer® brand in our International segment.
text: During fiscal 2017, we recorded goodwill impairment charges in our International reporting segment totaling $198.9 million, of which $139.2 million related to our Canadian reporting unit and $59.7 million related to our Mexican reporting unit. These impairment charges resulted from a change in reporting segments, which occurred in the first quarter of fiscal 2017 when we were required to determine new reporting units at a lower level, and from further deterioration in forecasted sales and profits during fiscal 2017, which were caused primarily by changes in foreign exchange rates.
text: In fiscal 2017, due to declining sales of certain brands, we elected to perform a quantitative impairment test for indefinite lived intangibles of those brands. During fiscal 2017, we recognized impairment charges of $31.5 million for our Del Monte® brand and $5.5 million for our Aylmer® brand in our International segment. We also recognized impairment charges of $67.1 million for our Chef Boyardee® brand and $1.1 million for our Fiddle Faddle® brand in our Grocery & Snacks segment.
text: Notes to Consolidated Financial Statements - (Continued) Fiscal Years Ended May 26, 2019, May 27, 2018, and May 28, 2017 (columnar dollars in millions except per share amounts)

Table:
2019
2018
Gross Carrying Amount
Accumulated Amortization
Gross Carrying Amount
Accumulated Amortization
Non-amortizing intangible assets
$3,678.0
$—
$918.3
$—
Amortizing intangible assets .
1,244.2
260.8
576.6
212.1
$4,922.2
$260.8
$1,494.9
$212.1

Questions:
question: What do non-amortizing intangible assets comprise of?
question: What was the impairment charges for Grocery & Snacks  during fiscal 2019?
question: What was the accumulated amortization of fiscal years 2018 and 2019, respectively? 
question: What is the ratio of amortization expense to accumulated amortization in the fiscal year 2019?
question: What is the percentage change in the total gross carrying amount of intangible assets from 2018 to 2019?
question: What is the proportion of gross carrying amount of  Non-amortizing intangible assets over the total gross carrying amount of intangible assets in 2018?