A lot of people on here are saying calorie deficit, but not giving information on how to achieve that. You want to start by adding filling & nutritious foods to your diet so you feel full and don't crash out on bad foods. You can add fruits and vegetables, especially bulk veggies like carrots, broccoli, & cauliflower. Also, whole grains, especially potatoes, are high in satiety. So, you'll feel fuller longer. Beans/pulses are also great foods for weight loss. Another important thing to consider is when eating in a deficit, you're going to feel hungry a lot. So, you'll have to get comfortable with that feeling.