Merge pull request #2748 from jamescowens/fix_fraction_class_addition… #3045

Job	Run time
Lint	42s
macOS 12 native [GOAL install] [GUI] [no depends]	12m 56s
ARM [GOAL install] [buster]	8m 20s
Win32	10m 8s
Win64	14m 32s
i386 Linux [GOAL install] [focal]	8m 49s
x86_64 Linux [GOAL install] [GUI] [focal] [no depends]	16m 47s
x86_64 Linux [GOAL install] [GUI] [bionic] [no depends]	14m 49s
macOS 10.14 [GOAL deploy] [GUI] [no tests] [focal]	9m 58s
	1h 37m 1s

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