We can either convert them to decimals or to fractions if decimals 2/3=0.66666666 4/5=8/10=0.8 so the order is -0.6, 0.65, 0.66, 0.8 or -0.6, 0.65, 2/3, 4/5
if conver to fractions then since -0.6 is negative, it is smallest, no need to convert 0.65=65 hundreths=65/100 2/3=66/99=prety close 4/5=8/10=80/100 order is -0.6, 65/100, 66/99, 80/100 or -0.6, 0.65, 2/3, 0.8