Percentages SAT question

The correct answer is $56$. It’s given that Cedric had $35$ plants in his garden last year and that the number of plants in Cedric's garden this year is $60\%$ greater than the number of plants in his garden last year. It follows that the number of plants in Cedric’s garden this year is $35$ plus $60\%$ of $35$, which is equal to $35+35(\frac{60}{100})$, or $35+35(0.6)$. This expression is equivalent to $35+21$, or $56$. Therefore, Cedric has $56$ plants in his garden this year.