When referring to a film image, aspect ratio is typically denoted in decimal form as a ratio of unit’s width per unit height. Aspect ratios are mathematically expressed as x to y or x by y, e.g. cinematographic 1.33:1 or 1.78:1. In video, this is usually expressed in whole number dimensions such as 4x3 or 16x9. More recently 4:3, 3:2 aspect ratios are being found in consumer cameras 16:9. Other aspect ratios, such as 5:4, 6:7, and 1:1 (square format), are used in photography as well, particularly in medium format and large format