\(\frac{13}{47}=\frac{13\times48}{47\times48}=\frac{642}{2256}\)
\(\frac{12}{48}=\frac{12\times47}{48\times47}=\frac{564}{2256}\)
Do : \(\frac{642}{2256}>\frac{564}{2256}\Rightarrow\frac{13}{47}>\frac{12}{48}\)
ta sử dụng công thức \(\frac{a}{b}=\frac{c}{d}\Rightarrow ad=bc\)
t nha Fairy tail
13/47 = 13 × 12 / 47 × 12 = 156/564
12/48 = 12×13 / 48 × 13 = 156/624
Vì 156/564 > 156/624 nên 13/47 > 12/48