the difference between a number and four sevenths is no more than negative nine elevenths
f minus 4 over 7 is less than or equal to 9 over 11
f minus 4 over 7 is less than negative 9 over 11
f plus 4 over 7 is less than or equal to negative 9 over 11
f minus 4 over 7 is less than or equal to negative 9 over 11