KEY: 0.75=75/100=¾; 0.375=375/1000=⅜; 0.0625=625/10000=1/16.
Things to note: 2×⅜=¾; 2×1/16=⅛; therefore 1/16=½×⅛.
You can convert all fractions to decimals or all decimals to fractions:
(remember that any number divided by itself is 1)
¾➗¾-¾➗⅜+⅜➗⅜-1/16➗⅛,
1-2+1-½=2-2½=-½.
0.75/0.75-0.75/0.375+0.375/0.375-0.0625/0.125,
1-2+1-0.5=2-2.5=-0.5.