Merge pull request #2748 from jamescowens/fix_fraction_class_addition… #3048

Job	Run time
macOS 12 native [GOAL install] [GUI] [no depends]	11m 53s
Lint	44s
ARM [GOAL install] [buster]	7m 7s
Win32	8m 15s
Win64	12m 4s
i386 Linux [GOAL install] [focal]	6m 48s
x86_64 Linux [GOAL install] [GUI] [focal] [no depends]	16m 7s
x86_64 Linux [GOAL install] [GUI] [bionic] [no depends]	15m 8s
macOS 10.14 [GOAL deploy] [GUI] [no tests] [focal]	9m 43s
	1h 27m 49s

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