14×45= \frac{1}{4}\times\frac{4}{5}= 41×54=
To multiply fractions, we multiply numerator by numerator and denominator by denominator
1*4 = 4
4*5 = 20
4/20
Note that we can simplify this fraction by 4
4/20 = 1/5
15 \frac{1}{5} 51