Hello!
To calculate your credit card utilization, we must divide your credit card balance by your credit card limit, and then multiply that by 100. 
CREDIT CARD 1: 
410 ÷ 1,000 = 0.41
0.41 × 100 = 41%
Utilization: 41% 
CREDIT CARD 2:
510 ÷ 1,000 = 0.51
0.51 × 100 = 51% 
Utilization: 51%