Decimal fractions are fractions with denominator 10, 100, 1000 etc. 0.5 = 5/10 = 1/2. Converting between decimals and fractions is a key skill for all competitive exams.
Key Formulas
Decimal to Fraction
0.abc = abc/1000
Count decimal places, use that many zeros.
Recurring Decimal
0.ababab... = ab/99
For repeating decimals.
⚡ Shortcut Tricks
#1
To multiply by 10/100/1000 — just shift decimal point right.