21 percent is 21% or 21/100.
If 70 is 100 percent, 31.5 is 45 percent.
45% = 0.45 or 9/20
45
2.00*45/100 = 0.9
60% of 45 = 27
45% of 90 is 40.5.
810
108
60% of $45= 60% * 45= 0.6 * 45= $27
100(21/45) = 47 %, to the justified number of significant digits, like dogs in this sample.
45% of 106.22 = 45% * 106.22 = 0.45 * 106.22 = 47.799