Percent means out of 100. 35% is 35 out of every 100, or the ratio 35 : 100. To write a ratio as a percent, scale it to 100. 3 out of 4 is 75 out of 100, so 75%.
Worked example
A grid has 100 squares and 59 are shaded. What percent of the squares are shaded?
Answer:59%
Percent means out of 100. 59 of 100 squares is 59%.
For grown-ups: Percent as "per hundred"; % symbol; common equivalents (50%, 25%, 10%). Below: three problems to try with the worked answers, and a free printable sheet. Children can practise the same skill as a game, with no sign-up and no ads.
CCSS 6.RP.A.3c
What this practises, for teachers
Practices percent as "per hundred"; % symbol; common equivalents (50%, 25%, 10%) (6.RP.A.3c). A printable sheet with its answer key, worked answers on the page, no accounts.