Final answer:
The percent of decrease in grocery spending is 14%.
Step-by-step explanation:
To calculate the percent of decrease in grocery spending, you need to find the difference between the two amounts and divide it by the original amount. Then, multiply the result by 100 to get the percentage. In this case, the difference is $350 - $300 = $50. Dividing $50 by $350 gives a decimal value of 0.1429. Multiplying this by 100 gives the percentage of 14.29%. Rounded to the nearest whole number, the percent of decrease is 14%.