Answer:
About 21.4%
Explanation:
280 - 220 = 60
60 of 280 = ?
Variable x = percentage
60/280 = x/100
Cross multiply
60 × 100 = 280 × x
6000 = 280x
Divide both sides by 280
6000 ÷ 280 = 280x ÷ 280
21.428.... = x
About 21.4%
Check work:
60/280 = 21.4/100
Cross multiply
60 × 100 = 280 × 21.4
6000 = 5992
6000 is close to 5992
It does not equal exactly 6000 because I estimated the percentage to 21.4% instead of 21.428....%