The bar graph shows results of a survey. 1500 people exiting voting booths were asked for which party they voted? Study the diagram and answer the following questions.
                                    Number of votersÂ
                                     Party
Question 20
If 30% of voters of party C had voted for party B, then party B's voters would have increased by _____________.
Solution
Voters of party C = 300
Number of voters who voted for B instead of C = $$\frac{30}{100}\times300=90$$
Voters of party B = 180
=> % increase in voters of B = $$\frac{90}{180}\times100=50\%$$
