1 We assume, that the number 500 is 100% because it's the output value of the task 2 We assume, that x is the value we are looking for 3 If 100% equals 500, so we can write it down as 100%=500 4 We know, that x% equals 300 of the output value, so we can write it down as x%=300 5 Now we have two simple equations 1) 100%=500 2) x%=300Formula Average = Total Sum of Numbers / Total Count of Numbers Input values The numbers from 300 to 400 are 300, 301, 302, 303, , 398, 399, 400 Total Count of Numbers = 101 step 2 Find the sum of numbers from 300 to 400 sum = 300 301 302 399 400 = step 3 Divide the sum by 101 Average = /101 = 350This video teaches counting up by hundreds 100,0,300,400,500 to 1000! Breviora Zoology Paleontology 100 0 300 500 600 700 B N Nini Ui Ll 0 100 0 300 400 500 600 700 0 100 0 300 400 500 600 700 D Numbers 300-500 in yoruba language