Da Vinci's association with golden ratio gained prominence through "The Da Vinci Code". His illustrations appeared in Luca Pacioli's "The Divine Proportion" (1509). Pacioli's book explored mathematical and artistic proportion, including golden ratio
Convert fraction to decimal by dividing numerator by denominator. Multiply decimal by 100 to get percentage. Add percentage sign (%) after result
Most common placement is after the number, like "25%". American English typically omits spaces before percent sign. Word "percent" preferred in formal documents
Percentage is a number expressed as a fraction of 100. Percentage sign (%) is commonly used, but pct. and pc are also accepted. Percentages can take values between 0 and 100, but not strictly restricted
SA:V is the ratio between surface area and volume of an object. SA:V is inversely proportional to size for given shape. For a ball, SA:V equals 3/r, doubling radius halves ratio
Denominator is the bottom part of a fraction, below the horizontal line. Denominator cannot be zero, otherwise fraction becomes undefined. Fraction represents one part when whole is divided into equal parts