Question

Emma sent 20% more emails in October than in September.

Emma sent 510 emails in October.
How many more emails did Emma send in October than in September?

Answer 1

If Emma sent 20% more emails in October than in September and she sent 510 emails in October, we can use the following formula to calculate the number of emails she sent in September:

Number of emails sent in September = Number of emails sent in October / (1 + Percent increase as a decimal)

Percent increase as a decimal = Percent increase / 100 = 20 / 100 = 0.2

Number of emails sent in September = 510 / (1 + 0.2) = 510 / 1.2 = 425

Therefore, Emma sent 510 - 425 = 85 more emails in October than in September.