This is 5th grade math [ 1,225 - ( 568 - 203 )] × 10 [ 1,225 - ] × 10 × 10

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

I’m really confused and need your assist me with this question i’ve never been taught

Grandpa ernie is shrinking! over the past 4 years his height decreased by a total of 2.4 cm. it decreased by the same amount each year. what was the change in grandpa ernie's height each year