langsung caranya ya!

( [tex]2 \frac{1}{4} [/tex] x 10000 ) + (3,5 x 4500 )
= 22500 + 15750
= 38250

0,64 : 56%
= [tex] \frac{64}{100} : \frac{56}{100} [/tex]
= [tex] \frac{64}{100} x \frac{100}{56} [/tex]
= [tex] \frac{64}{56} = 1 \frac{8}{56} = 1 \frac{1}{7} [/tex]