In 2014, 2,277 was 110% of 2013.
Number in 2013=90% of the year before (2012)
Let the number in 2013 be x. From the first statement,
2,277 = 110% of x
2,277 = (110/100)x
2,277 = 1.10x
x = 2,277/1.1 = 2,070
Number in 2013 is 2,070
Number in 2013 = 90% Number in 2012
2,070 = (90/100) * Number in 2012
2,070 = 0.90 * Number in 2012
2, 070 / 0.90 = Number in 2012
2,300 = Number in 2012
Number in 2012 = 2,300