Question

4,85-2 целых 13/21= 7 целых 8/21- 4,375=

Answer 1

$4,85 - 2 \frac{13}{21} = 4\frac{85}{100} - 2\frac{13}{21} = \frac{485}{100} - \frac{97}{21} = \frac{97}{420} \\\\ 7 \frac{8}{21} - 4,375 = 7 \frac{8}{21} -4 \frac{375}{1000} = \frac{155}{21}-\frac{4375}{1000} = \frac{505}{108}$