Anthony and Adam were running in a race.anthony finished the race in 6.3 minutes.adam finished the race in 4.92 minutes. How much faster was

speed = distance/time

Adam's speed = L/4.92   if L is the distance.

Anthony's speed = L/6.3

Adam's speed/Anthony's speed = (L/4.92)/(L/6.3) = (L/4.92)*(6.3/L) = 6.3/4.92

$${\frac{{\mathtt{6.3}}}{{\mathtt{4.92}}}} = {\frac{{\mathtt{105}}}{{\mathtt{82}}}} = {\mathtt{1.280\: \!487\: \!804\: \!878\: \!048\: \!8}}$$

so Adam is approximately 1.28 times as fast as Anthony, or about 28% faster.

6.3-4.92=1.42 minutes.