Answer:
The percent error is 40%
Step-by-step explanation:
To calculate the error percentage we have to divide the final amount over the initial amount
350 / 250 = 1.4
then we subtract 1 since this represents the estimated value
1.4 - 1 = 0.4
this is the error factor we have, to express it as a percentage we simply multiply by 100
0.4 * 100 = 40%
The percent error is 40%