Jono = 1 unit, Mark = 3 units. Together that is 4 units = $1300. Mark has 2 units more than Jono.<br><br>[[model:questions/solutions/q3195.png]]<br><br>• 4 units → $1300<br>• 1 unit → $1300 ÷ 4 = $325 (Jono)<br>• Mark − Jono = 2 units → 2 × $325 = $650<br><br>Jono had $325; Mark had $650 more than Jono.<br>Check: $325 + $975 (Mark) = $1300; $975 − $325 = $650. ✓