Save 106 bytes of flash space by converting only remaining float division to int

before
   text	   data	    bss	    dec	    hex	filename
  15536	    668	    302	  16506	   407a	.build/uno/firmware.elf

after
   text	   data	    bss	    dec	    hex	filename
  15430	    668	    302	  16400	   4010	.build/uno/firmware.elf