9514 1404 393
Answer:
18% better
Step-by-step explanation:
The percentage improvement is computed as ...
percent change = ((new value) -(old value))/(old value) × 100%
= ((2:44 -3:20)/(3:20)) × 100%
= (164 -200)/200 × 100%
= -36/200 × 100%
= -18%
Sarah's time has improved (decreased) by 18%.
