In mathematics, a percentage is a number or ratio that represents a fraction of 100. It is one of the ways to represent a dimensionless relationship between two numbers; other methods include ratios, fractions, and decimals. Percentages are often denoted by the symbol "%" written after the number. They can also be denoted by writing "percent" or "pct" after the number. For example, 35% is equivalent to the decimal 0.35, or the fractions 35/100 and 7/20
👉P × V1 = V2
👉EX: P × 30 = 1.5 P =1.5/30 = 0.05 × 100 = 5%
👉EX: 500 increased by 10% (0.1)
500 × (1 + 0.1) = 550
👉500 decreased by 10%
500 × (1 – 0.1) = 450