Respuesta :
21/25 Since this is a proper fraction you would divide 100 by 84..
[tex] \frac{84}{100} \\ \\ GCF = 4 \\ \\ 84 \div 4 = 21 \\ \\ 100 \div 4 = 25 \\ \\ \frac{21}{25} \\ \\ Answer: \fbox {21/25} \ or \ \fbox {0.84} [/tex]