because 12.75 x 4 = 51
1020 x 100 /1275 = Cancel down by '5' 1020 X 20 / 255 Cancel down by '5' again 1020 x 4 / 51 = 4080 / 51 = 80%
sum of n natural number is n(n+1)/2 first 50 number sum is 50(50+1)/2 = 1275
12.75 = 1275/100. This can then be simplified by removing the common factor, 25, to give the answer 51/4.
180 divided by 40 is equal to 4.5.
12.75 = 12 and 3/4 = 51/4
16/4= 4
4.
159
10
12.75
4
1,260 divided by 4 is 315.