matematika 21 1/2 -7 3/10-63/8

21 1/2 - 7 3/10 - 63/8
= 21,5 - 7,3 - 7,875
= 21,5 - 15,175
= 6,325
= 6 325/1000
= 6 13/40

[tex]21 \frac{1}{2} - 7\frac{3}{10} - \frac{63}{8} \\ = \: \frac{43}{2} - \frac{73}{10} - \frac{63}{8} = \: \frac{860 - 292 - 315}{40} \\ = \: \frac{253}{40} = 6 \frac{13}{40} [/tex]