How to use: Perform arithmetic operations with fractions (add, subtract, multiply, divide). Select Operation. Enter two fractions using Numerator 1, Denominator 1, Numerator 2, Denominator 2. Results show: simplified fraction result and decimal equivalent. Rules: Addition/subtraction need common denominator (1/2 + 1/3 = 5/6). Multiplication: multiply numerators and denominators (2/3 × 3/4 = 6/12 = 1/2). Division: multiply by reciprocal (1/2 ÷ 1/4 = 1/2 × 4/1 = 2). Applications: cooking recipe scaling (halve/double ingredients), construction measurements (3/4 inch + 1/8 inch), woodworking, sewing patterns, music time signatures. Essential for elementary math and practical everyday calculations.