Brian has reduced his cholesterol level by 13% after his last check up. If his original level was 200, what is his cholesterol level now?

174

Explanation

Because Brian reduces his cholesterol level by 13%, he now has 87% of his original cholesterol level. Multiply his original cholesterol level by the percentage of his original cholesterol level he has left (.87) to get his current cholesterol level.

200 * 0.87 = 174