155/510 = 31/102 = 31 ÷ 102 = 0.303922
510 ~ (510-360) ~ 150 Cos 510 = Cos 150 = - Cos 30 = - ( radical 3 ) / 2
510% = 5.1
510/100 = 51/10
510 is an integer and so there is no sensible way of writing it as a fraction or mixed number.
0.0118
it is 2/10
a decimal fraction means a fraction that changes into a decimal or a decimal that changes into a farction
30 510/1000 = 30.510 or just 30.51
0.0196
5/10
510%
0.21 is a decimal fraction.