Math Calculators

Calculate percentage decrease instantly. Free percentage decrease calculator with step-by-step explanation and formula. Fast, accurate, and easy to use.

Calculate aspect ratios for images, videos, and screens instantly. Free aspect ratio calculator with common presets (16:9, 4:3, 21:9) and real-time results.

Free quadratic formula calculator to solve ax²+bx+c=0 equations instantly. Get step-by-step solutions, real and complex roots, discriminant analysis, and interactive graphs.

Solve systems of equations instantly with this step-by-step calculator. Learn substitution, elimination, and matrix methods with examples and solutions.